Last evening I baked four cake layers. I was falling asleep, and wanted to get to bed, so when they had just a suggestion of warmth left to them, I wrapped them in saran wrap and put that in a freezer bag and plopped them in the freezer.
Did I ruin them by not waiting until they were 100% cool? It was really just a suggestion of warmth, so not much. I'm giving this cake away, so I hope I didn't ruin the texture. It was the WASC with oil recipe.
I try to put all of mine in the freezer while still warm. The remaining steam from the heat makes a very moist cake!
Same here....there is a post somewhere about his...I put mine in the freezer still hot....almost burn myself trying to get them in the freezer. I will see if I can find the post and add it about putting them in the freezer warm. Suppose to add moisture.
) before freezing and they're so moist I practically have to pour them out of their wrapping. I can't imagine what they'd be like if I put them in the freezer while HOT! 
Just my two bits worth. I wait till completely cooled. Was taught in high school cooking/baking course, that freezing while still warm causes excess moisture which in turn causes unwanted ice crystals.
50 odd years later I still follow that advice! 
Ice crystals might be an issue if you were planning on leaving them for a while in the freezer, but most people are only leaving them a few days. It isn't like they are going to get freezer burned overnight. I haven't put mine in the freezer while hot, but I have done barely warm and completely cool. I have left them as long as a week, and I personally can't tell the difference from a fresh baked cake. I do suggest that when you remove them from the freezer that you remove the wrap to assure that any excess moisture on the wrapper doesn't make your cake soggy. I remove the from the freezer wrap and cover lightly with plastic wrap and allow them to thaw completely before using (but that's just me and my humble opinion)
Quote by @%username% on %date%
%body%