i admit there have been times where ive done a bit of landfeeding (most noticeably in the set where i jumped top1 in a 2 man nation and broke Jameswheel in top1 b4 dropping down again to stock and then later war)....however i am pretty sure i didn't do any land feeding in the high set (although i admit that margus and dolly helped with NA/intels).
EDIT: also Max, keep in mind that i played for a very long time with Margus/Dolly & James all of whom gave me training/tips & advice for a long time on how to play & grab....anyone can do it with the right amount of time, dedication & knowledge.
EDIT2: credit to Viali & Calvin (and maybe a few others i cant rmb atm) as well who taught me quite a few things.