as a rule of thumb, everything else remaining equal (such as sidewall, composition, tread pattern, etc), a wider tire outperforms a skinner tire in every category. it's harder to spin out a wider tire, which helps when launching during a drag. a wider tire increases the friction base, so handling will be improved.
of course like i said..it's just a rule of thumb. if you already have a wide enough tire to where you can't spin out during a drag..then an even wider tire would do you no good whatsoever, it's a waste.
lost in all of this is the fact that a smaller sidewall profile tire handles a lot better than even wider tires when cornering. the stock sidewall has a 55 profile. a 35 sidewall makes a WORLD of difference (in a good way). 30 is even better purely from a performance point of view..but it won't feel too nice. the smaller a tire sidewall, the better the handling, but the less the comfort. the bigger a tire sidewall, the worse the handling but the better the comfort.
also lost is how soft or hard a tire is, a softer tire improves performance by increasing grip in acceleration, handling, and braking..but will wear faster. a harder tire decreases performance in acceleration, handling, & braking..but will last a lot longer.
as with most things..moderation is key.