In defense of DayTrading101, in my own experience it did seem that every stock I was in did poorly once Clay showed up. Perhaps it was in my head because a lot of posts were saying that. I was hatin' on Clay and his stool pigeons hard. Then, I was in some stock where Clay showed up and it was like he and his pigeons weren't there.
I think he may be more impact for day-traders but really nothing on those who are swingers. And, I was more of a day-trader in the beginning before finding my way to swinging.