I guess. I think the important thing is getting the program in your head, not on the screen. If the code is too complicated to hold it all in your mind then more columns of crisp text will not save you.
I actually kind of agree with this. For me, the more pixels the better (I'm sensitive to fuzzy text, and subpixel rendering makes it worse), but I'd really prefer just one monitor, not too big. 15-19" is fine, especially if it's 4:3. 1600x1200 on a 17" monitor would be really nice.
I know I'm getting into old man yells at cloud territory here, but nobody needs this. Code on a 1024×600 netbook display, it will build character.