Apple sold 315 million touch screen devices in 2011. Short of a figure of how many actual touch screen devices sold in 2011 (not ICs), it's not easy to work out the percentage. If I was to estimate based off the apparent fact that 1 device was sold for every 1.6 integrated circuits in 2010, this would be in the order of 25-30% of all devices in 2011, but we know that wouldn't be accurate.
http://macintude.net/2012/03/07/apple-announces-new-sales-figures/
In fact, I dug deeper and found the following:
http://tabtimes.com/news/ittech-stats-research/2012/03/28/iphone-ipad-lead-way-booming-sales-touchscreen-chips
I quote:
"Capacitive touch screens, like those first used by Apple in its various iDevices, made up 54% of the touch market in 2011."
That's quite different to what you've stated above.
The original source article is as follows:
http://www.isuppli.com/Home-and-Consumer-Electronics/MarketWatch/Pages/Touch-Controller-IC-Market-to-Nearly-Triple-in-Just-Five-Years.aspx
I'm not trying to show you up for every article you post, Douglas, but I simply felt the need to point out an error, that's all.