I have a thread somewhere where I made a jalapeno and sweet onion wine for cooking. About 2 months after pitching when bottling I sampled it. The heat was too much up front and I didn't even care for a sip of it. It's been bottled for a month or so, but I'm not planning on opening it anytime soon.
I used 10 jalapeno's de-seeded and chopped in primary, nothing in secondary/clearing. For reference of the heat, I love franks red hot on most everything.