Underwood's has good potato salad, cole slaw, beans, corn, green beans, great cobblers, rolls and iced tea but I have a hard time calling their meat "barbeque".
It's not difficult to get a spirited debate started as to whether true BBQ can be cooked on a standard grill. Of course, for that matter, it's not very difficult to get a heated debate going about nearly any aspect of BBQ. There are some techniques that can be used to achieve some pretty admirable results with a standard grill.
As for the stuff cooked in the oven, or the crockpot, soaking in BBQ sauce, it is just plain old baked or stewed meat. It bears no resemblance to real BBQ whatsoever.