I had two link lists yesterday that I ran into this because I had submitted late the night before...but they both send a ton of traffic, so I don't complain. I just went to dinner, came back, and submitted my site then. Yea, I'll just have to wait until later today, and the next day, etc but I usually take 1 day off a week from submits, so I get back on track then.
The sites I ran into last night, send so much traffic, I'd imagine they would be flooded with submits if they didn't have that rule.