yep, looks like they vary.
- I had once or twice problems with the downloadable content. Both reply and fix for it was done in 24 hours.
- and I had once an inquiry about RK, response was fast (in a day), but answer pissed me off (was basically told to have fun with SPM support).
as for responses now: afaik they are doing maintenance of the shop, so admin side of support might be down too in the next few days.