Yes, be careful that it's not just an upswing. Of course you'll happily take any hot streak that comes along, but you don't want to try to predict future success on it. I recently had about a 10K hand streak of close to 25BB/100 hands, but since then I've been treading water for probably my last 10K hands, hardly making money at all - and my play hasn't changed significantly, either. It's natural variance.