I think if you want to consider yourself a well-rounded DJ, you have to be able to adapt your style to anytime of night. You should spend the time to find records that work great at peak time, as well as records that work great in the early hours of the night and morning as well. If you can bring the same feel/style of a peak-time darker techno set into the beginning of your set I think it will make a great difference.

If you're simply just someone who does nothing but bang it and that's your style (i.e. Glenn Wilson)...then yes, it should be the promoter for putting you on early.

A good example is Hawtin. I'm not hear to say his music is good or bad, but his sets can go from minimal to very heavy in a few hours and still keep the same feel or similar sound.

You'll have to excuse me if I don't make sense. I went out for a bit tonight.