From my experience it depends on the snail, I have cycled with ramshorn, malaysian trumpet, apple, and pond snails. I don't know what the scientific data is on each snail but I can tell ya that the pond snails seem to survive dang near anything, apple snails are almost as tough, but trumpet and ramshorn are a lot more sensitive.
I know this because I have cylcled tanks with snails and also have added ramshorn and malaysians during peak ammonia cycle periods. The rams and trumpets don't handle it very well. I think the pond snails could care less. Malaysians are sensitive to poor water, they like to burrow in the substrate and only come out at night unless the water quality goes down (usually starts in the substrate of course) then they start fleeing the substrate I am told, acting as sort of a mine-canary of sorts.
When I'm done, the clown loaches are added to eradicate the little snails if they get too numerous. I have a 10g I am using to breed pond snails for my 4 clown loaches right now, there's a betta and african frog in there as well (I think I need a few buddies for the frog...)
I am always amazed at how many snails that 4 clown loaches can eat in about 2 days. They seem to be able to clear a tank of (a lot of) snails in a couple of days.
my memory is short at best today. 
