Seriously, Tom's Hardware, do you really have something against making proper reviews and tests? It almost looks like you intentionally want to screw up tests.
Let's see the hardware configurations you chose :
1. Atom - Ion 2 : Low CPU - High video
2. Core2 - Intel : Medium CPU - Low video
3. i3 - Intel : High CPU - Low to medium video
4. i5 - nVidia : High CPU - High video
4. Neo - 4225 : Low CPU - Low video
note: low and high video are in regard to 2D/3D performance in desktop, not games.
We have 4 generations of Intel processors from low performance and power usage (Atom), to middle Core2 and i3 (office usage), to relatively high performance (i5).
Yet we have only one AMD processor that's designed to compete against Atom, paired with the only AMD video card, one that's also designed for notebooks and has the lowest performance out of all the cards, by design.
On the first platform, Flash is basically using Ion2 to decode the video in hardware.
On the Core2 and i3, the intel video cards are not good enough and don't have drivers good enough - everything is decoded in software
On the i5, both the processor and the video card can easily decode the video, and the video card is powerful enough to do the compositing in window mode
On the Neo, you have both low performance processor and low performance video card - while the card can decode the video in hardware the processor is barely enough to do the compositing with various other Flash layers, while still handling the 3D Aero.
Also, the lowest performance nVidia card used is a 600 Mhz part using the 4th generation of hardware decoding, VP4, introduced in 07/2010. In contrast, the AMD's only presence is an old chip running at 380 Mhz, using UVD2 and introduced in 01/2010. AMD is now at UVD4 with the 6xxx series. Hell, it's so slow the Firefox CPU usage was high because there was a flash or gif animation on the same page with the video making the video card sweat.
Where the hell is a mid-high CPU coupled with a decent AMD video card, like 4670 or 5450? I'm currently using an Intel Q6600 coupled with an AMD 4850 - in window mode, 1080p content is barely using 20-25% cpu while in full screen it's barely going over 15%. It's obvious hardware acceleration is working perfectly fine in both cases.
There are plenty of laptop video cards from AMD, parts labeled 6xxx part that are actually chips from the Radeon 5xxx series, which have UVD3 and have much better performance than the HD4225.
Naturally, in Full Screen, Flash can use other hardware acceleration features that can't be used in 2D so the performance is much better.
I also don't see any mention of Flash 10.2, currently in beta, which introduces a completely new rendering technique which allows in most cases complete hardware rendering of everything in Flash. I'll quote from the official beta page:
http://labs.adobe.com/technologies/flashplayer10/
Flash Player 10.2 introduces new features and enhancements, including a new video hardware acceleration model that enables dramatically enhanced video playback performance.
Key new capabilities in the Flash Player 10.2 beta include:
* Stage Video hardware acceleration — A new method for video playback in Flash Player will allow developers to leverage complete hardware acceleration of the video rendering pipeline, enabling best-in-class playback performance. Stage Video can dramatically decrease processor usage and enables higher frame rates, reduced memory usage, and greater pixel fidelity and quality.
* Internet Explorer 9 hardware accelerated rendering support — Flash Player takes advantage of hardware accelerated graphics in Internet Explorer 9, utilizing hardware rendering surfaces to improve graphics performance and enable seamless composition.
* Native custom mouse cursors — Developers can define custom native mouse cursors, enabling user experience enhancements and improving performance.
* Support for full screen mode with multiple monitors — Full screen content will remain in full-screen on secondary monitors, allowing users to watch full-screen content while working on another display.
I have this running on my system and the performance IS improved compared to the old one, but the most important reason I actually installed it is the possibility of watching a movie in full screen on the second monitor, which works as advertised.
When was this article done, October- November 2010?
PS. And by the way, Youtube also uses 960x540, mostly for their live streaming at events but also on some videos. Usually they cheat when people select 1080p and the video is too popular or the person has bandwidth issues, it falls down to 960x540.