I read the same thing from an article on Chuck Hawks' website. According to Mike, who is pretty experienced on the subject, Chuck Hawks does not give sound advice pertaining to handguns and handgun ammunition.
Different handguns like different bullet weights. Being that I'm rocking a 9mm as well, I keep it loaded with 124gr. The best of both worlds...better momentum than a 115gr, and better velocity than a 147gr. Being that my XD has a 3" barrel, I would rather not use a 147gr as it won't get accelerated very much. On the flip side, Speer only makes a short-barrel Gold Dot in 180gr in .40S&W, which is the heaviest of those bullets...they don't have them in 165gr or 155gr.
Whether you're using a 115gr or 147gr, a few well-placed shots of 9mm HPs will take someone down. Your handgun might not like 147gr bullets, or it may love them. Shoot a box and see how well your gun puts them to POA and how it feeds/ejects. Just don't go below 115gr as you won't get adequate penetration.