I just made a big post about this on ICmag which was censored and taken over by trolls because I gave Ken's GDP a piss poor review. Anyway, I will do it again later for all of you here at RIU
ok.. Ken's GDP is not GDP... Go figure.. It is a cheap knockoff of a local strain called "Granddad's Purp". Ken took seeds of this and mixed it to a purple champagne kush and got his shitty version which does NOT smell sweet and taste like grapes. If it`s DHN or Mendo GDP, it is potent, sweet, and BIG!
Grape Ape, Mendo Purps, Purple Urkle (real), and GDP all taste very similar because they are all very closely related. Mendo Purps and GDP are actually sister plants similar to Brothers' Grimm; Cafe'Girl, Apollo11, and C99.
There is no strain called "Grapes" going around in the Bay Area right now, it`s probably a private creation by a closet grower (non-commercial). If it comes from the Bay and it`s called "Grapes", it is likely a knock-off from Dark Heart Nursery in Oakland, CA.
DHN specializes in a few clones but they are also a hit or miss.. 50% of the stuff from them is good. 25% is KILLER!, 25% is shit/hermis/no resin.