He does a really good unbiased breakdown on all 3. He didn't really say anything bad about any of the 3. He obviously swings toward the m&p but apples for apples I agree. I own the other 2 but the m&p is next on my list. Along with a SCAR 16. And a bunch of others.
The grip angle he mentions on the Glock isn't something folks really notice until they pick up something like the M&P or any FNS/FNX pistol. I like Glocks as there is a great deal to like about them. But that slightly high front sight that I have to bring down every time annoys me after using a pistol with a 1911 grip angle like the FNX.