Absolutely.
Plus, when the conservative viewpoint is available in equal proportions to the liberal one, the conservative one usually wins the argument. Common sense based on reason and logic usually does. Since NBC/CBS/ABC/CNN only feature the conservative viewpoint 5-10% of the time, they are biased.
You think its really that much? Usually, when the "conservative" viewpoint is being presented, its some bowtie wearing, non-offensive guy, like George Will or William Kristol, who is "safe" because he won't point out the fact that Clinton is a traitor or that Hillary is the anti-christ.