consider the fact that the average joe probably would be straining to hold the bar with 85 pounds at his shoulders (instead of rest it on them), and lack the explosiveness and technique to get the most out of the movement, both pulling the bar up, and getting under it, yeah, 45 and 85 sound reasonable to me.
Hell, a lot of guys who train can't even do a single overhead squat with just the bar (not because of strength, but balance and flexibility), how do you expect them to snatch much more than that? You really can't.
The average joe also won't have the confidence in himself (or the ability) to catch the bar on a snatch or clean in a squatted position, which ultimately leads to more weight being snatched and cleaned.
Since their technique will blow, they'll be trying to muscle it up and be doing an 85 pound reverse curl or a 45 pound barbell front delt raise since they just don't know any better.
Then again, who the hell really knows?