I don't think I've seen full, non-rain stall in BW at all. There are generally too many threats to check with a 6 Pokemon defensive core, which is why the almost always have something like Scarf Jirachi (in BW1) or Scarf Genesect (BW2) to take some pressure off that core. Loads of people have tried to claim their stall teams have been doing well in BW2, but I'm willing to bet a lot of these people aren't actually running stall, and are just running something more like balance (I know a lot of people call these teams "semi-stall" but I really hate that term, semi-stall is stall that has some offensive presence in the form of a scarfer or a late-game cleaner or something, which makes it balance. I'm not a fan of people labelling their teams with overcomplicated names that mean the same thing lol).
On top of Tornadus-T, Thundurus-T, Keldeo etc, I think one of the bigger changes in BW2 that has really hurt stall is Giga Drain Venusaur. Sun offense was already a pretty big issue for the vast majority of stall teams, but now Chansey and Blissey aren't even good checks to Venusaur, as at +2 its healing back loads of HP with Giga Drain. From experience the best answers most stall teams have to Growth Venusaur is either Heatran (which pretty much has to be Shed Shell to even stand a chance against Sun anymore), or by attempting to get Hippowdown in on anything other than Giga Drain and pivoting to force Venusaur out with Genesect (I don't really consider any "stall" team with Scarf Genesect as full stall anyway but w/e)
edit: also just for the record, I thought rain stall was one of the most overrated playstyles in BW1. Once everyone knew what it did and how to face it, it became incredibly easy to prepare for. A handful of mons (Virizion, Toxicroak, Tornadus, Sub SD Terrakion, non-choiced Landorus, most Dragons etc) had excellent match-ups against it and could sweep with little to no support. It was no doubt annoying to face for the first couple of weeks it was popular, but I feel its one of those incredibly match-up dependent playstyles; you either had a team that would nearly always been Rain stall or you had a team that couldn't really touch it (i.e. a bad team).