Flint's brother died from bloat so I know it can happen.
And though it is more common in barrel shaped dogs such as the GSD, any large breed dog can get it. Same with Hip Dysplasia, most people seem to think it is just a GSD disease, but any breed can get it, [bulldogs being the most common if I remember right.] And it's not necessarily genetic, my GSD came from Ch. parents who were both OFA 'good' and a grandparent who was OFA 'excellent' [only fewer than 1% of Shepherd get that rating] and sadly my girl developed Hip Dysplasia by the age of 6 months. CsV's seem to be a relatively healthy breed though, all I'm saying is all large breed can develop these problems.
The only health problems Flint has had is he's allergic to chicken [devlops hot spots/itchy skin] and he has a very sensitive stomach but I have him on a good diet and he never had a serious problem.
As for lifespan, I don't know since Flint is only 5, but his grandfather, Ali Reolup just turned 14 and is looking good so I'm hoping for a long healthy life with my boy! :]