In the last week or so, I've begun to get strange, semi-relevant guest comments to my blog entries. One was simply random characters, but most were of a very generic "thank you for that information" type that contained enough odd detail to make them seem more like they were matched up based on key words rather than a human actually replying to what they read. Example:

"Hi there, just became aware of your blog thgourh Google, and found that it is really informative. I’ll be grateful if you continue this in future. A lot of people will be benefited from your writing. Cheers! "

Has anyone else seen this behavior? It has an odor of someone field-testing an automated CAPTCHA reader, but I'm not sure what to think. Could it be that the red and blue letters in the generator are too easy to filter? Thanks!