I think he's talking about Ultra, X Tekken, etc. Although they did all score in the 80s.
Still not entirely true, the other versions of SFIV were upgrades for the hardcore players and they did pretty well, but SFxT was indeed a fiasco, it sold below expectation and it basically shut down Capcom's will to invest in other fighting games
SFIV numbers are here. I count 7,5 million copies with all the versions (without Ultra's numbers):
http://www.capcom.co.jp/ir/english/business/million.html)
Capcom has become extremely risk-averse, so it's not surprising how Ono was tweeting he didn't have the budget to make a SFV despite SFIV's success.