I love tasting green beer and I highly recommend it.
Open a bottle at one week... wow, it's ok, but something seems "off." Note that flavor.
Open a bottle at two weeks (seriously, what's 2 bottles out of 48?)... man, this just got much better. That "off" flavor is gone.
I figure if I keep doing this, I can get a good idea of what the finished/conditioned product will taste like once all the flavors have melded together. The more I do this, the more training my palate is receiving, and that's a good thing in my opinion.
Do it or don't, it really doesn't matter, because we know the beer will be best after some conditioning... however, the time period varies wildly with style.