I haven't any experience with any Glocks, but have noticed that folks either love 'em or hate 'em. Doesn't seem to be much middle ground for some reason. I personally wouldn't put much stock in putting forth an opinion until I've actually tried one, so I'll let that part go.
The 9mm, as far as bashing is concerned, I won't do that either. While I prefer a .40 cal, that's just my individual preference.
There was a time when almost every law enforcement agency in America relied on the 9mm. Then along came the .40 and all of a sudden, there was a change in attitude about the 9'er. Terrific.
At the risk of sounding strange, I don't think size matter so much as product placement.
In a life and death situation, it is much less important how big the round is than whether you can place that round where it will stop a threat.
That's the bottom line. Can you place the round where it needs to go in order to stop a threat? If the answer is yes, then you've got a round that will do the job for you. Even a .22 or .380 will do the job, assuming you can deliver the product with accuracy.
So enjoy your 9'er. Work with it, and forget what anybody may say about it being an inferior round.