Can't comment on other areas but in EECS my experience was 2 - 3 was the norm. (Never ever heard of 5 - 6 although I presume you'd get that many if you submitted a paper with "cold fusion" in the title.)
Stuff is becoming so technical these days that from those 2-3 reviewers you are sometimes lucky to get a single person with a real understanding of the subject matter and competent to vote on it. The whole peer review system is almost as broken as the patent system imho.
Stuff is becoming so technical these days that from those 2-3 reviewers you are sometimes lucky to get a single person with a real understanding of the subject matter and competent to vote on it. The whole peer review system is almost as broken as the patent system imho.