Okay...
Sitting here (literally) sampling 3 beers, two with Diamond slurry, one with 2124. All have gelatin.
Two beers are a Premium Czech Pils, one is a 5D, German Pilsner.
No off flavor is detected in the Czech beer, with Diamond / 2124.
There might (might) be a subtle hint of an off flavor (soap) in the 5D. But the beer is good. Perhaps it's the hops? I will soon find out as we have several beers entered in the AHA-NHC. I am getting prepared for a royal hammering by the judges!
The Diamond drops clear, real fast. But brilliant crystal clear clarity is my goal, thus the use of gelatin.
The Wyeast 2124 does not flocculate well at all. Not even at 31 F. After a week in the keg, added the dreaded gelatin. It is now clearing, but not yet brilliant.
And again, there is a possibility that this is my imagination. Or...I have a hyper sensitivity for some sort of hop off flavor. Not sure...