[citation][nom]11796pcs[/nom]Could Tom's start putting CF/SLI setups on the hierarchy chart? It would make choosing whether to go with a CF/SLI setup vs. a single card alot easier.[/citation]
Probably because scalability depends very much on the drivers and even more so when they're in their first stages (which is usually when most reviews are done). This changes over time, obviously, but the scalability is more... what's the word here... variable? Variability? Yes, it varies from brand to brand, motherboard chipset, etc.
Even this chart isn't completely accurate. I remember Sapphire HD5850 Toxic was factory overclocked and it could compete very well against HD5870, same for "SSC" Nvidia cards from EVGA, etc. They try to stick to "stock" and "reference" cards and give a general perspective, but there are alternatives which could even skip a tier (like how GTX 460 is overclock-friendly and it can even bite on GTX 470's heels).