I have a Nexus One. There's no reason to even bother with subpixel font rendering -- the DPI is so high that the text, with regular anti-aliasing, looks far sharper than ClearType on a normal density screen. I imagine Droid owners have the same experience.
The article is not discussing sub-pixel anti-aliasing, rather it makes a case for why understanding the sub-pixel properties of AMOLED screens can decrease power consumption while increasing screen life.
Really nice picture. Subpixel anti-aliasing looks like a bad idea when you look at the edges of the font in xmag, but it looks like an amazingly good idea when you look at the actual display.