Originally Posted By: brandtb

As a Glock 9mm carrier I was particularly interested in this -

The magazine only has 10-12 rounds in it. A few months earlier, he had heard the theory of "spring set". He decided not to keep the magazine fully loaded.

I Googled it, but could not find anything except ads for after-market springs for Glocks.

The spring set probably is not that much of a problem. It mainly is an issue with material and heat treatment. Springs loose some tension when they experience sustained stress beyond a certain level for extended periods of time. For a service pistol that should have been taken in consideration for design. If the set happens you might loose a round or two from your magazine capacity. When you take the pistol to the range for practice, a developing FTF problem should be detected early enough to take measures (i. e. change the spring or the entire magazine).
I have some buddies who are LEOs and have their magazine fully loaded when on duty. None of them mentioned problems with magazine springs.
If it isn´t broken, it doesn´t have enough features yet.