Quite probably raced/ridden on worse, done cobbles, lots of cobbles (so many cobbles ), currently ride on lots of washboard, it's everywhere at the moment due to the odd winter we had, we get a fair bit anyway, even after the roads get graded. Cobbles, well, rock filled dirt tracks aren't uncommon either.
And yes, of course i've used all the different Camelbacks, as it's pretty much the only brand i buy myself. Everything else i have is either something i've got from neutral service/teammate/freebies/random reps/gifts.
As a rider, aren't you far far far more likely to get random bottles handed up than have "random bottle cages"? Easier to make the thing bolted to your frame compatible with as much as possible, rather than having to be picky about what container the water is being handed up in?
I'm not, i have one style of cage i use for everything, and i've yet to find a bottle size/compatibilty/model/finish that doesn't fit and remain in place.
I'm sure i'll manage one day.