I think the LHBS guy is wrong. I heard Jamil say he doesn't pay much attention to what type of beer a yeast cake comes from, the impact is marginal if any.
Something is always fermenting....
"It's Bahl Hornin'"
Kegged: Sour Saison, Pale Ale, Aggie Ale, Firestone DBA, De Koninck Blonde
Bottled: Belgian Quad (Grand Reserve), Derangement (Belgian Dark Strong)
On Deck: Pliny the Younger