Might give this a shot myself.
Also, Pooky you are right regarding super hot chilli germination. But it also applies to growth - they also grow slower and take longer to mature. At least my really hot chillies seem to grow much slower.
I think hot chillies are also more sensitive to cold than "normal" chillies. So I'm hoping that as the weather gets warmer, they grow faster.
A little more background information - the Capsicum genus comprises all chillies, and there are several species that have been domesticated. Capsicum annuum contains jalapenos and bell peppers, capsicum frutescens contains those little red chillies (birds eye chillies and tabasco chillies), and capsicum chinense contains the really hot chillies (habanero, bhut jolokia, 7 pot, etc etc). Capsicum chinense are the ones that grow and germinate slowly.
Quite interesting, I've got some chillies I planted out side my window a few years ago. I just put the seeds in the ground an left them. They get watered when it rains, and get morning - midday sun. They seem to be doing quite well and are quite big!
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Did a few varieties in the ground this year. Next year I am going the pot routine instead.