I've been using Ernie Ball light guage strings for as long as I remember, 'cause that's what I was told to use 20 years ago.
I have to say that Fender strings, especially the lights they ship on American Strats are very impressive. I have kept them on the guitar for 10 years. Now, I don't so much play guitar as collect them, but people who both know how to play and have played my guitar have commented on the strings - they do bend well and go well with the strat type.
I wouldn't recommend them for a crunchier, Les Paul sound, but I would highly for Jackson, Ibanez or Strat/Tele, espeically single coil.
ETA: Specifically the silver bullets, I use Fender 3250Ls which came stock on American Strats.
This post was edited on 2/1 at 3:06 pm