Ya man, they took a good look at the CoinMarketCap Asset List.

http://coinmarketcap.com/assets/

Let's see:

NXT................... 37 assets all types/sizes, 60 sec blocks, liquid exchange, rock solid platform (I've done > 200 trades with zero issues)
Counterparty.......  7 assets, but near zero liquidity, 10-20 minute block times, down a lot just when you need it
Bitshares............  5 hedging assets, Wall Street ETFs and options will make these primitive tools irrelevant
Mastercoin.........   2 assets, but it's really all the controversial MAID vapor-PO
Nubits...............   who knew Jordan and his friends would sell a virtual Fed to the rubes?