I am talking about other means of progression than what Rippetoe suggests: simply adding weight to the bar. I don't even think absolute max weights are PRs and from time to time I don't even look at PRs because to me PRs can mean a whole lot of things. For Rippetoe, a PR is a PR only if you increase the weight. He limits every form of progression down to just one factor: the load. And I am the one who threw the baby out with the bathwater?
You asked me about injury rate. Fine. Thats pretty easy to answer. For the next 3-4 days, just check out the Workout Programs section on bb.com. Everyday there will be a bunch of "injured while on Rippetoe" threads which will pop up. But, lets say you discount that: a few years ago there were these guys who were the biggest campaigners of Ripp's program. One of them - the most impressive of the lot, managed to (in 9 months and @ 16 years of age) get so strong he could Squat 500 lbs, Deadlift 600 lbs and Bench Press 450 lbs. What happened to him? Nobody knows. His last journal entry was something he got injured and ever since, there's been no talk of him. At one time, if somebody argued that Rippetoe doesn't get you strong, he'd be set forth as an example. He was their true poster boy. I think his name's Toefur or something...I dunno...can't remember the details.
If you want to talk about injuries, head over to the Rippetoe forum - it used to be on Strength Mill and now it's on his own site. Whenever Rippetoe is questioned by some kid talking about being injured, he tells the kid to deal with it. Rippetoe is extremely callus in his approach to injury prevention. You ask him how to avoid injuries and he's gonna give a very simple answer: "Be careful and other than that there is nothing because everyone gets injured so fucking deal with it." Now, IMO that is no way to address such an issue. To me, injuries aren't a joke and every single thing should be done to avoid them like the freaking Black Plague.
Rippetoe isn't selling his book for charity. This is a money making business for him. He's not helping people out on his forum for fun. It's marketing. His goal is to profit. Who is his market? Teenagers and youngsters just getting into lifting who he can talk shit to and treat like shit and they just keep coming back for more and more.
Ask Rippetoe about foam rolling, mobility drills, unilateral exercises, how to avoid and prevent injury and about progressing using something other than single factor or linear periodization.
If someone is new to lifting, what should be the primary focus: loading the bar or the quality of each rep? Rippetoe says load I say quality.
Linear factor periodization is just A-Ok. There's nothing wrong with that and I have zero issues with that principle. But we're not discussing that.
If you guys want to know more about this, go to the forums I listed and check it out for yourself. Also, spend some time on IA's forum - which has some of the storngest people on the internet posting and helping others on it and you can check for yourself how almost none of the big guys are fans of Rippetoe plus most of them don't like his exercise cues either.