I have to say, Two Wounds, that's the first I've heard of that one. Glocks can't make it through 50 rounds at your school? Where's the course, under water? If Glocks couldn't go 50 rounds without a malfunction, there is no f#$%! way they could have possibly captured the market share that they have, especially among top professionals in the military, law enforcement, and training communities. No freaking way. Any Glock that cannot make it through a 50 round course of fire without experiencing a malfunction or breakage of some kind is either defective, not properly maintained, or has an owner who doesn't know how to hold it(with a firm grip and locked wrist)--pure and simple. Also, it is a known fact that Glocks require less lubrication and maintenance than any other pistol in the world. In short, it is simply not possible for a Glock in proper working condition to not be able to make it through a fifty round course held on the planet earth.
Now, the most likely cause of these malfunctions you and your colleagues have witnessed, is limp-wristing. Limp-wristing is the most common cause of stove-pipe malfunctions with the Glock, among new shooters, or those unfamiliar to the Glock. Were these newbies shooting those Glocks, or experienced Glock shooters? I'm not trying to defend the Glock at all costs, it's just that your and your colleagues' experience at your range directly contradicts the first-hand experiences of most other firearms instructors and schools around the country. If you ask top trainers, like the ones at Blackwater, Gunsite, Options for Personal Security (Andy Stanford), or Insights (Greg Hamilton), they will tell you that Glocks consistently outperform and outlast most of the other guns that go through their schools, and are equal to the rest.
Two Wounds, let me ask you, do you actually think that if Glocks were inherently less reliable than the other major auto brands, that so many professionals and civilians around the world would rely on them to save their butts? Miami PD, FBI, DEA, U.S. Customs, GSG9, Austrian COBRA, top U.S. S.W.A.T units, special operations personnel, bodyguards, and top shooting instructors all over the world, all rely on Glocks on a daily basis.
I have to say, I don't see any of these people using Rugers, now, or in the future. In fact, the F.B.I. switched from Sigs to Glocks, and it sure wasn't because the Glock is inferior. Reports from the F.B.I have been very favorable so far. Miami P.D., Coral Gables P.D., and South Miami P.D. all really like their Glocks and swear by them.
I will say it here and now--no one in their right mind should recommend Ruger over Glock, unless it is for the reason of price. Don't get me wrong, Rugers do have a reputation for going bang every time--but they are simply not at the level of a Glock. A Glock that is in proper condition, with proper lubrication(which is very little), is as reliable as any firearm in the world, save perhaps an HK P7, which is in a reliability class all by itself. You can also get a first shot off faster with a Glock, than with a Ruger, as it has a lighter and shorter trigger action and lower bore axis than the double action autos.
Basically, Two Wounds, you've gotta' be biased. It's the only explanation.