So then why coinchoose deleted Yacoin?
Maybe because they couldn't quantify it? They were basing the price on Bter.com but were calculation the profitability solely on block reward and difficulty as if the hashing was normal scrypt and not scrypt-jane.
In other words:
IF a GPU could hash YACs, and
IF the rate for scrypt-jane was equal to normal scrypt, then coinchoose's 400% made sense. But neither of those IFs are currently true though and even if someone eventually makes a GPU miner there is no indication that for example a 7950 which gets 600Kh/s would the same hashing scrypt-jane.