I got the "R" today for my short sub for the anthology. They got way more subs than they anticipated, so the response time factor is skewed. If you haven't heard anything yet, be patient--and good luck!
I've had two interactions with them. One, I emailed to see if I could submit a story for an anthology that fell just short of their minimum word count. I received a quick reply that I could but it would be a hard sell. The second was a kind, personalized rejection for the same short story. Based on these two interactions, I'd sub to them again.