The HOR kill team got tried out by a couple members a month ago or so, but hasn't gained much steam on tuesday nights, so far. I think the guys that have been playing have had saturdays at guardian, or just randomly scheduled weekdays.
I'm, personally, happy to play low-point games/teaching games of 40k, and would enjoy trying out any of the skirmish rulesets. I have very few nits to pick, and have no problems with unpainted or proxy models while you are trying things out.
As to your concerns(observations?), I think flyers and Super-heavys end up being the rock-paper-scissors style, where if you have things to deal with them, you're fine, and if not you struggle. Since most games around wOw are friendly, I think its entirely appropriate to pre-amble the game with no fliers, no super heavies, etc.
In my experience, at WOW people often come prepared for a 2000 pt game, but I've seen any level being played.