Yes they did, the SCHMOTUS' constant laughter and rudeness was noticed by others.
Like for example, CNN's Gloria Borger
or Chris Wallace, who called it unprecedented:
"I don't believe I've ever seen a debate in which one participant was as openly disrespectful of the other as Biden was to Paul Ryan tonight,"
Others from both sides of the aisle chimed in:
NBC's David Gregory
The Miami Herald’s Marc Caputo:
WAPOs Chris Cillizza:
Pittsburgh Tribune-Review’s Salena Zito:
Much of America had to wonder, "With al Queda attacking our embassies, slow job growth, rising oil prices, and so much wrong with the economy; just what the hell is he laughing about.
Based on the media reactions and the flash polls, I was wrong. People noticed and appreciated the fact that Paul Ryan was polite and respectful and Tickle me Biden was a Jerk.