Well, if you want to compare NXT with ETH, then compare this:

NXT repo:
https://bitbucket.org/JeanLucPicard/nxt/overview
6,446 commits

ETH repos:
https://github.com/ethereum/cpp-ethereum
11,974 commits, 14 releases, 70 contributors.

https://github.com/ethereum/go-ethereum
6,984 commits, 80 releases, 63 contributors

And the above ETH stats are just for 2 of the many Ethereum projects.

Edit: I fixed the numbers, as I refered to the wrong repo.