I don't think so. Boucher is damn good, make no mistake, but a large number of catches point to a large number of chances, garnered from playing a large number of matches and having bowlers all your career who induced thin nicks. And bowlers of the calibre of Donald, Pollock, Kallis, Klusener, etc. certainly did that.
Statistics can't tell you all that much about a wicketkeeper, unless someone keeps a record of all missed chances and does a missed-chance:taken-chance ratio. That will tell you a hell of a lot. As would something (this'd be even more difficult to notate) that gave you a number of simple fumbles (ie, something that should've been taken cleanly and wasn't, regardless of whether it went for 0 byes or 4) compared to the number of deliveries that went within range.
As of yet, no wicketkeeping statistics have been compiled that tell you much about the actual calibre of wicketkeeping, though, as I say. It would be possible to do something retrospectively for quite a while now as for a decade and more every ball of international cricket has been televised, but that'd be a labour-intensive process.