Personally, not sure I agree. Of course there is a huge varying description to failure. Advanced trainees failure definition, is not that same as a novice.If you're a beginner; that's too much...it can force too high of a lactic acid and blood CK level to recover from in a practical amount of time.
I think it is easier for a beginner to recover and go this far and still makes gains, since the beginner is no where near using the weights/loads and having the inroads and recovery issues that more advanced trainees are doing. They hit 90%-100% failure pretty quickly and are spent because they do not have the recovery to keep beating the horse like more advanced trainees do. That is why so many differing tests can show results. Because they use novices and novices/untrained respond to almost any type of protocol and training.
This is again where I see some training science(s) and laws, kind of getting in the way of just...
- Going to gym (showing up is the most important thing, most failures are not stapled to)
-Lifting weights up (too much enphasis put on how many reps, how many exercises, how many angles...)
- Going home and eating (nuff said)
-Going back to gym 2 days later and lifting more (adding weight to the big compounds, is one of, if not the most important point, if one one to keep getting bigger and stronger)
repeat...