Another vote here for "considerable soil warmth is the key". I've never had any problems with peppers, but I have always started them on a heating mat or in an always-very-warm location. Actually the worst time I've had with peppers is probably in this house I'm in now, b/c I start seeds in my 55 F basement and even with a heat mat underneath that's still a bit cooler than peppers really appreciate. And I still get probably 75%+ germination... just have to keep them as warm as possible once they are up and growing.
Some *hard* seeds need sandpapering or acid-treating, but I've sure never heard of anyone doing that with *peppers*.
Good luck, have fun,
Pat