So, I asked this question over at AW, too, and someone told Brooks about it. Here's his answer:
Hey guys, Brooks Sherman here. Someone just told me about this thread, and I thought I'd clear up the confusion here myself. Yes, I am definitely open to considering science fiction submissions, and I apologize for any confusion with the term "speculative fiction."
Also, I don't use that term out of a desire to make genre fiction feel somehow less genre. Honestly, I use it because it's a helpful blanket term to show my wide interest in all stories slightly "off" from normal, whether that be science fiction, high fantasy, urban fantasy, paranormal mystery, literary horror, etc.
Hope this helps!