I went to the website, and see that it is a Salix. Same family as Weeping Willow. So I believe the claim of quick growth.
I hope that we're ready for chickens by early spring. Our grading project should be done by this weekend. Then I've got a mound of tree debris to process. I expect at least a month of work doing that. Some for firewood, and the small stuff to the burn pile. Then I've got to do about 500LF of fencing and finally, construct a coop. So...spring is a reasonable target, if not optomistic. Good new is, my kids are only 2.5 so I've got a little time.
