Looking good. I don't think the heat will cause any change to the m/f ratio, but I suppose it could bring out hermie properties in plants that have that tendency. I wouldn't sweat it though, looks like you caught it in time.
I had read about that kind of stress being controversially linked to herm properties in plants, but I couldn't find the article after the fact. It's good to hear that they look OK, thanks!
I think of it this way: A lot of plants have hermie tendencies in them. Under most circumstances, those tendencies don't manifest and all is well. If they come under stress, however, something in the plant triggers and BAM - balls.
The WW will double in height in flowering, at least. I don't know about the bubblegum... some plants can really shoot up to 3 or 4 times their height, preflowering. You'll probably not see pre-flowers until you are actually in 12/12, especially if you plan on making the switch early, which you most def should. Here's a journal of a grow I was watching where he ended up having to chop WAY early due to height: http://forum.grasscity.com/grow-journals/298932-first-grow-afghan-attic-grow.html