I grew a WW. I too had heard that they stretched a lot and got branchy, so, being that I grow in a 2 X 2 X 4' high cabinet, I was a little worried. I decided on a short veg of only 2.5 weeks, and no LST or topping.
Here's what I ended up with.. Grown under a 400 HPS from start to finish.
She weighed 1.5oz dry. Killer smoke though!