Let's face it, it didn't hurt wrestling at all because this wasn't a shoot. The thing was plan from the start. The only thing that was different from a regular promo is that Punk was given bullet points instead of a full script. It was done in a old school type of way and it worked because you had the right guy to pull it off.
The thing is, this is the type of promos that they should be teaching in NXT instead of having them learn how to memorize a script. You need to be able to think on your feet when you cut a promo and get yourself and the program you're in over with the promo. If you just recite a script like a robot without putting any of yourself in it, it's going to be harder to get over. The pipe bomb was the perfect example of a lost art in wrestling which is the bullet point promo. It got across what it needed to get across and made a star out of CM Punk.