i say quality over quantity. if you know how to practice and if you have developed the ability to notice your mistakes and instantly work on them, you dont need a 5000 hour routine. i learn more in 1 hour now than i used to learn in 4 hours back when i had no clue how to learn. be efficient.
this must be one of those guitarist-ego syndromes...
"look i practice 12 hours a day" .... "you suck - i practice 20 hours a day" .... "but i´m faster - i can play 3 billion notes a second" ...