Exactly what I've been saying. And XWorm, on that level 0 Soviet DD, I don't know what it's supply was but both my level 3 subs were at 9 supply and they still lost the battle. I replayed it and it turned into a 9-8 exchange with the Soviet DD still winning. When I was UK, my L0 destroyers were repeatedly slaughtered by L2 subs.
Scook, if you look back, you'll see that I suggested a "no suprise" option for destroyers moving and encountering subs. I also suggested that when the subs are doing the attacking, that there would be no change. In addition, I suggested that the chance for the subs to dive away be increased if the "no surpise" option was implemented. I believe it would be a more entertaining and realistic "sub hunt" aspect for the game.
Also Hubert, after finishing another game I have to say that the research lottery is creeping up from #3 on my irritant list. It is at least #2 and possibly #1 now. I was the Axis and it was mid 1943 before I got my first advance in tanks and it was ugly in the east.