It is sad that the number of genuine comments is eclipsed by the number of spam comments. It is a cause of joy that Akismet has eliminated more than 1100 spams - 500 genuine comments did make it to this site so far. What strikes me that there are hundreds of sites, using gmail addresses, trying to pander (probably fake) medicines, some quite illegal in some countries. Others try to lure you to their (probably boobytrapped) sites with fake compliments. And several abuse the trackback feature. I leaf through the dozens of spam that get cleaned up each day, just in case. But never was there anything that could be rated as a genuine comment.
Switch on Akismet if you haven't already done so.