It's interesting to see a different strategy succeed, these two teams are very well coached and have a strong team culture. Teams like the Bucks and Clippers simply trying to outspend everyone hasn't worked out as planned. The super team strategy won't ever go away but teams like the Hawks and Suns this year and the Raps two years ago are proving it isn't a guaranteed ring.
Add to that drafting well and having a young core that is (1.) generally healthy and (2.) cheap so you can fill out the roster with quality veteran pieces and have depth and flexibility.
Contrast that with the super-teams built around 2-4 superstars on super expensive contracts and then whatever scraps of has-beens and never-weres you see elsewhere. Interesting to see the two team-building strategies play out, but it seems the patient one is the one working right now.
That super-team strategy can work (see LA last year, even if the bubble was a weird situation), but these playoffs are one of the greater youth movements I can remember in league history. The "teams of the future" are quickly becoming teams of the now, and some of the best players under 25 are starting to outplay who we usually think of as stars, though ones now just slightly past their apex period of production.
The top eight guys by minutes on the Hawks are...
22
22
26
23
29
28
32
29
AVG = 26.4
The top eight guys by minutes on the Nets was...
29
28
34
24
23
31
32
32
AVG = 29.1