I know the general wisdom is that, for similar ABV, lighter colored ales are supposed to be ready sooner than darker ales but in my experience it's not always true.
For example, I have an ESB on tap that I brewed 2 weeks ago today, and the sample I tried yesterday was fantastic. In fact, I could have happily pulled several more pints, but I stopped myself because I don't want to drain too much too early. In comparison, the blonde ale in an adjacent tap is finally starting to really taste great, and it's a few weeks older than the ESB. I distinctly recall the 2-week sample I pulled from that tap, where I took a sip and said "blech.... not ready yet."
I think the moral of the story is, all beers are different, and the best thing is to give all of them at least several weeks to blossom. I'm all for stealing early samples just for fun, but try to resist continual pouring until after 4 weeks or so for most beers, with the possible exception being IPAs where you want to enjoy the full power of the fleeting hop aroma.