I don't really care whether the number is 1000, 1500, 2000, whatever, but as a relative new hire (who had just a bit over 1500), I don't think instructing alone is the best way to get there.

I learned considerably more about airline style flying from 135 than I did from instructing. I would hope people would instruct to get their 135 mins then find a 135 job...it's valuable experience and the best bet for multi time.

Just my opinion of course, and I'm sure somebody will jump all over me for not treating instructing like the holy grail.