Our brewing partner in "science", Marshall "Brulosophy" Schott released results of a biotransformation experiment here. In it he brewed a NE IPA recipe that was double dry hopped. Two batches brewed with the first fermenting out for a few days before the second was brewed. The second batch received the first dose of dry hops while the beer was at high krausen. The first batch received it's dry hops after the beer was done fermenting.

In the end, while there was an apparent visual difference, not enough of Marshall's tasters successfully chose the odd beer out to make a call of significance. 

We thought - wouldn't it be fun to turn the IGORs loose on this one and see if we can see something in  a larger sample set.

To simplify matters for the IGORs, we're tweaking the experiment a touch to make it easier to execute. First, we're simplifying to a single dry hop to allow the greatest difference in nose. Second, instead of requiring two separate brew days, we're going to have the IGORs manage the exposure length by racking. (e.g. Pitch both beer simultaneously. When Batch 1 hits high krausen - dry hop it. Allow the beer to finish fermenting and reach terminal. Record the number of days the beer was on the hops. Rack both beers. Dry hop the second batch and hold on the hops for the same number of days as the first batch. Package and keep cold until serving)