Hmm, I got the 14 inch and it takes no more than 30 seconds to start up (usually less). I'd never heard about that eyesight thing but maybe its a good thing I got the 14"er cuz I'm only almost 16 and already legally blind in one eye (I can still see, just really badly, lol).
Whichever you get I hope you like it. I haven't let mine go in the 3 weeks I've had it.