I don't know how significant it is, but I Googled my latest release, a werewolf thriller, and found it on BookStrands. I'm assuming that BookStrands is one of the smaller "e-tailers."
Anyway, according to what I'm seeing, it has the #1 slot for horror and the #2 slot for thriller, in the 30-day bestseller category. That might make sense, since my promo campaign was well on it's way for three or four days before being listed on Amazon. Even though BookStands seems to be heavily geared toward romance, I did notice that there were 135 titles listed for horror and many more in the thriller category.
So if I'm reading that right, yak, yuk, yahoo! I'll take it!
tri