I think you will benefit from knowing that over 80% of what is submitted as comments to .wordpress.com blogs every day is spam and Akismet does an excellent job of sequestering it. The worst of it is never sent to us to moderate as it contains malware and/or viruses that could bring down many blogs. Also know that approving a single spam comment will lead to more spam as spam attracts spam and spammers wait to see if will will approve generic comments. Please take the time to read "5 things every blogger should know about spam" on this page Akismet: How it works
On the other hand, some nice, complimentary comments were in the spam box. I wondered why.
Did you know that there are people hired to submit such comments? The last time I went to a bloggers blog to help her with spam every comment she had approved (56 of them ) were spam.