Let's hope not.
Although to be fair, it's a bit rough saying they have a "usual finals choke"... in the two Grand Finals they've made - in 2005 and 2008 - they came 2nd overall and won their semi-finals fairly convincingly, but were ultimately faced with having to play an All Black laden Crusaders team at home on both occasions.
Saying that losses in those two grand finals is "choking" is like saying the Kiwis choked against the Kangaroos in last year's RLWC final; the team they were up against just always looked better.
To be honest, I have my doubts about the team due to their set-piece problems and think their recent wins against weak teams may be giving us all a false sense of confidence. But all the same, the Waratahs have actually never been in this position before (they've never finished as minor premiers), so it's really there's to lose.