Ernests Gulbis first caught my attention at the 2007 US Open, beating Fish in a 5 setter and humiliating Robredo and giving Moya a run for his money.
Gulbis didn't play with Fish at the 2007 US Open, he beat Starace, Berrer and Robredo. And Gulbis has never won a 5-setter, in fact he has never played one. All his Grand Slam wins prior to yesterday were in 3 sets, losses were in 3 or 4 sets. So Gulbis achieved a significant milestone in his GS career against Blake - he recovered from one lost set and went on to win the match.
As his fan, I don't want to set my expectations very high because Gulbis has disappointed me during the last year very often. But he's getting better so I'm cautiosly optimistic.