You could substitute most any other modern pistol in the article and be correct. Glock certainly wasn't the first reliable pistol on the market, nor were they any more durable. Heat one up and the frame will melt as will an M&P. About the only two guns I have seen jam up in matches are 1911's and occasionally Glocks. The latter in G!7 mode are easy to limp wrist when shooting around barricades on the weak side.
The gun was, though, very inexpensive to make and was sold to LEO Departments for a song when the guns first came out.
They are good inexpensive pistols suitable for LEO and Military use.
They have a huge fan base, and are popular in 3 Gun and IDPA. The minimum 5lb first pull distracts from it's use in IPSC Production, although Bob Vogel won the IPSC World Shoot in Greece with a stock G17 much to the amazement of the CZ crowd.
The Glock ergonomics fight with a brick as to which is more blockier and the grip angle cause the gun to point high in most hands.
The gun works, has a fan base, and can be a tinkerers dream gun. LEOs use them because their departments issue them.
The Drug crowd plays with them cuz all you have to do is pull da trigger. From the shootings down in Surrey I would suggest da boys need some training cuz da bullets seem to miss, unfortunately, more than they hit.
There are a lot of guns out there suitable for playing the games. and the Glock is but one. If you really are an accomplished shooter I would suggest there are better alternatives than the Glock - Some CZ and Tanfoglio models both come to mind, along with the Walther Q5 Match, HK and you could throw in a SIG or two and likely a few others I have missed.
Take Care
Bob