I originally thought he had a shot of doing just that (grinding him out, not submitting him fast), but this fight is five rounds which means Siver is absolutely fucked even if he wins a round or two on the mat at first (which wouldn't surprise me at all). Just doesn't have the gas tank to preserve all his skills.
I am a fan too.
All that could change if he manages to catch some kind of finish and crash Sherdog for like a week and a half though. That's most likely only going to happen if he hurts McGregor with a spinning back kick or a high kick or something then chokes him out, though. He's not really a submission machine although his takedowns, top game, GnP etc are all pretty nice.