Overheads are at least 20+ frames on the most part. He's exaggerating about the 100 frames, but the overhead is pretty obvious. The thing about her damage is, the opponent can afford to make a LOT more mistakes, compared to say, the Tsubaki player. "Oh? I got hit? Whatever big deal."
You can beat a lot of things with reversals and gold burst, but there's a thing called risk and reward, and Tsubaki's reward off doing stuff like that...isn't really much at all. Also, compared to a lot of the cast, Tsubaki can't afford to do an IB reversal, because her reversal will either trade into NO ULTRA, or she will get beat out clean. Either that or her dp gets air thrown or something stupid. Her D DP has been beaten by jump-ins. It's rather hilarious actually. Baiting stuff? You can bait stuff with a lot of characters, but now we're moving onto higher level play where there's the element of "yomi" involved.
In the end, the risks a Tsubaki player takes to get minimal damage far exceeds the risks of the majority of the cast to get decent/high damage in. And to be honest, I don't think you really have a fair say on how Tsubaki does in a competitive environment when all you've done is play netplay and computers. If you want to reinforce your arguments, I suggest posting videos or actual evidence supporting your views.
Also, fixing up your grammar and spelling can help convince people in indirect ways.