I tried this with a Lager yeast(Wyeast 2278) today and it didn't work so well. Everything just clumped back together and settled back out, no separation. It's worked great for me on Ale yeasts
Maybe I didn't mix it up enough when I added the initial water?
Kegged:Kolsch, Barleywine, Foreign Extra Stout, Not so Black IPA
Primary #1: Kolsch
Primary #2: An experiment
On Deck: IPA,Stout,Pilsner