On the mark? No. You only have to listen to Rush for about five minutes before you hear a lie and about a minute before you hear something violent or insulting. Glenn Beck is just a glorified conspiracy theorist, along with other crazies such as Michael Savage and so on.
Like how Rush told his listeners that Obama is putting small business owners out of business with his taxes to businesses over $250,000 (which I guess would hurt small business owners). In reality, only 2% of small businesses report net income over $250,000.
How about how he declares himself leader of the Republican party?
How about how he gets mad at other Republican leaders for wanting Obama to succeed as a president? He doesn't just want Obama's policies to fail, he wants him to fail as a president.
How about how he used to preach daily against drugs and how drug users were the scourge of the Earth, while he was scamming to get OxyContin and other pills before finally checking himself into rehab?
Of course there's entire books on this idiot and if you want the real proof of his lies, go look it up. There used to be news segments dedicated to picking out a few of his lies every week and refuting them.