To Shaver’s credit I think he says those are guidelines and not ones he has produced. Muna was never super strong (at least when I was at LSU) but she was very elastic. Dennis actually noted this and never forced her to get to super numbers in any of the lifts. Lolo seemed to be quite easily the strongest sprinter / hurdler when I was at LSU but she was nowhere near 350 lb squats but she did have decent OL numbers.
I’ve found most of my better athletes tend to be quite strong in the OLs and Squat but I don’t really chase numbers and I’ve never had anyone squat anywhere near 600 lbs for a full squat (although I’ve never had anyone run 9.79 either!).
I’ve come to the point where I use strength work as a stimulus and an intra-athlete correlate to speed. I’ve found it’s nearly impossible to use bench mark test numbers (especially weight room numbers) as correlates for speed. I don’t even bother any more.
As for the Markov remark…I actually believe it because it was more likely a Bulgarian split squat (which is essentially a split squat / lunge).