DocGKR once wrote:

I would much rather go into battle with a guy who practices 15,000 rounds a year using generic 55 gr FMJ out of his old M16A1 than with some guy that has the latest state-of-the-art ammo and rifle, but only shoots 500 rounds a year.
I think this applies to training as well.

I'm don't care about the methods, as long as you can apply them efficiently.

I'd rather fight next to a guy using the old ''teacup'' grip who shoots 15,000 rounds a year, than a guy who ran a Magpul glass and preaches it to the book and knows it by heart but only shoots 500 rounds a year.