It's the basis of "Huge in a Hurry", you can also find on his website.
"Now, if we take momentum out of the equation and focus on traditional strength exercises with free weights and cables, it’s usually better to perform the concentric phase as explosively as possible. This philosophy forms the foundation of the programs in my book, Huge in a Hurry."
"Forget lifting moderate weights slowly for lots and lots of sets and reps. The best way to get huge in a hurry is to use heavy weights and lift them quickly for fewer repetitions. "
From the Tnation website - Bicep curls specifically:
"Waterbury: Right. So if you do those curls slowly – a 2-1-1 tempo, something like that – you might recruit half your muscle fibers. But if you curl it up explosively, you'll hit 'em all."
I'm not trying to over think any of this, I was merely pointing out this article struck me as surprising. As someone who has been using Waterbury and Thibs programs for years and avid reader of the site, I thought it was worth starting a discussion.