I made a crab pudding/souffle (lots of egg whites) last night and it didn't rise at all. I've made it before successfully, but this time I didn't put any salt in because I felt the result had been too salty before. Could the lack of salt be the culprit? Or do I just need to perfect my whipping & folding techniques??? Thanks!
No, salt actually destabilizes egg white foams. The small amount added to a souffle won't ruin the souffle, but the meringue will actually hold a bit better without it.
There are many reasons for a souffle to not rise (overbeaten whites, bad folding, wrong base consistency, wrong oven temperature, etc.) but salt is not one of them.