Hmmmm, you "suddenly" developed? Either you are a beginner or full of crap. Nothing is "sudden" when it comes to muscle building (aside from using gear). Oh wait, maybe you have such great genetics that even looking at pullovers makes you develop "serratus definition".
And as far as wid-grip pullups. Do you somehow have a different muscle structure than the rest of the population? Did you do them to the point you could add weight and still do 4 sets of 10? Or did you try them for a couple of weeks....could only get a couple reps....and then concluded that they "somehow" didn't do anything for you? Come on man, you can't be serious?
All the usual signs of arrogance here. Yes, sometimes you do suddenly develop, suddenly being a relative term meaning in short order, over a short period of time when something's particularly effective-it's happened to me. At the same time, it's physically very clear what works or doesn't.
Wide-grip pullups aren't necessary at all-many prefer medium-grip, which was also espoused by Arthur Jones. Close-grip as well, really hits the lats. Personally hammer-grip is the best, no comparison; experiment there as well with every option and go with feel in the muscle.
What the "book" says, or what scientific studies suggest, are useful guides and starting points only. Bottom line is feel, baby. But hey, it's your sweat;
you have some learning to do if you don't know this.
