User blog comment:Fistful of Force/Counerjungling part one./@comment-76.103.143.149-20121229201342

Lol what...to address your point of "Don't do it"

1) you counter jungle based on BOTH your position as well as the enemy jungler's (with some consideration w/ enemies/allies in lanes). Therefore if you have sufficient knowledge of timings/speed, it's more than certainly viable. This not only covers the time/speed issue of your first point but also the safety of the 2nd point

2) It's a huge gain. Not only do you gain the money/xp of the camp, they are denied it. You're ahead, they're behind.

3) wards. Liberal use of these = success

People who advise against counterjungling lack experience/skill/knowledge to do it. Don't spread this ignorance around.