I have seen this letter before and came to the conclusion that it was more then the ice that led to the bloat, like the others said.
I give room temp water as well, always, because if I give Gage cold water on hot days he will throw it up, and if he drinks a bunch of any water after eating he will throw it all up so I do what I can to limit his water intake. Gage loves chewing ice, he gets a few cubes here and there, if he hears ice rattling in a glass he comes running!