I think sub-pixel rendering is quite different from anti-aliasing. Unfortunately, you cannot show the effects on a CRT screen, where both techniques look similar (yes, I find this kinda confusing, too
With sub-pixel rendering, the red, green and blue sub-pixels of every LCD pixel are addressed separately to triple the resolution fonts are rendered at.
I find this hard to explain, please take a look at the "m"s on this page here, and it will become clearer, I hope:
http://www.microsoft.com/typography/...ame=%20&fsize=
On a CRT, sub-pixel rendering will just make the fonts fuzzier. On an LCD, readability is improved - if the LCD is suitable for the technique. My knowledge ends right there: is the TTs screen suitable? And the TT2s? Has anyone run a test with Wordsmith? I think it sucks on the Palm Reader, though...
Some time ago, I used to be an anti-aliasing fan due to aesthetic reasons, nowadays, I prefer non-anti-aliased fonts that were constructed with screen resolution in mind, like Verdana, Georgia, Tahoma, and Trebuchet.