I don't care about the guys ages that much really. Sure it's great to have one eye on the present and one on the future, but the NOW is what matters most.
Titles don't grow on trees. We went 22 years without one. But we did get one with this group, and it's well within the realm of possibility that, if healthy, we could be working on a three-peat.
Tell me about the teams that have been built through youth and are actually successful. The Thunder are first to come to mind, but they struck gold in the lottery, which is rare. They had the mistake made ahead of them, so there was no Marvin Williams (Greg Oden in this case) on the table for them to mull over.
Chicago did well in the draft, but they too won the lottery, which is unlikely. They were also bad-terrible for the better part of a decade. They have won exactly one playoff series in the last 12 seasons and still had to spend like madmen on backup plans this offseason.
The truth is, this Celtics team is set up to win NOW. Experienced vets (even if they are in their 30's) will help this team for the next couple years achieve their ultimate goal. In the meantime, drafting players with high upside like Bradley is the best way to go. Is he ready now? No, but he could be an impact player in a few seasons. Harangody can be serviceable maybe, BBD proved his value, Perk is a quality starting center, and Rondo is Rondo.