Since it's waiting until confirmation of block generation and paying based on the last 5 rounds these losses will be obfuscated because they happen proportionally over the next 5 rounds. As I miner all you'll be able to notice is that your earnings seem to have decreased.
What is this 5 round thing you are writing about?
Where in DGM do they mention 5 rounds? Note this point in the DGM article:
the expected payout per share is always the same no matter when it was submitted.