I'm sorry for being vague, but that's exactly my problem: I can't find an online blog post of a German/Scandinavian master anymore which illustrated a case of a young boy from Eastern Europe who managed to reach 2500 mark (in a few months time span) thanks to some suspect tournaments and timing. His coach fine-tuned everything to exploit the delay in updating the Elo list, combined with an excellent performance on a local tournament.
Does anyone can recall a similar story?
I'd really love to read the post again. It was backed up with data from the FIDE official site.