34T shifting problems?
I've read snippets on various threads suggesting that people sometimes have shifting problems when running a 11-34 or 12-34 rear cassette. Indeed, one contributer appeared to suggest that some bike companies spec their tourers and MTBs with 11-32, rather than 11-34, rear cassettes because of these shifting problems.
How prevalent are, and exactly what is the nature of, the shifting problems being alluded to? Is it difficult to get into the 34T gear, or is their a slippage problem once in the gear, or what?