Just downloaded

Because maxing W and E provides more benefits.
W is essential for a decent jungle time and procs his passive more, which leads to better sustain. E is what lets you chase decently at all. I usually do:
W Q E W W R W Q W E R E E E Q R Q Q, but Q definitely gets maxed last.

EDIT:
[MENTION=977]raizoo[/MENTION] no, real men learn to jungle with Karthus or Lee Sin.

W is actually a great first point for Warwick, but it's not great enough to max first. Have you tried W-Q-Q-E-Q-R-Q-E-Q-E-R-W-W-W-W-R-E-E ?

• Warwick already has enough sustain to not use W in the jungle.
  
• lvl5 W has 16s cd while lvl5 Q has 6s cd ― pretty sure most junglers who don't have an AoE rush Wriggles first to clear faster anyway.
  
• Q resets your auto-attack animation so you can be spam happy if you have blue buff. It also deals damage based on % of the opponent's maximum health or something.
  
• E is kind of tricky because it can reveal that you're in the area if you forget to toggle it off. Red buff will help you stick to the enemy a bit at early levels.
  
• If you max Q last, you are even more useless once your ulti is gone.

Jungle Lee Sin is pretty hard on a beginner ― he has life steal, he doesn't use mana as a resource, he's very skill shot dependant. Jarvan is just man mode.