The font was very comfortable to read on my old 3GS, what type of screen are you reading on? Regarding serif fonts, I've certainly found a new appreciation for them since getting a laptop with a retina screen.
I'm on Macbook 13.3-inch LED widescreen display and do not like the font either.
Since the majority of internet users have much less pixels per inch as compared to the retina, I think it should be best for websites to use san serif.
Since the majority of internet users have much less pixels per inch as compared to the retina, I think it should be best for websites to use san serif.