When we were testing with the beta testers the percentage of spam in total comments was about 64%, as of writing this it has risen to over 78% and is hovering near 80% day-to-day. It’s been interesting to watch as new people join the network the sheer volume of spam they get. The blog who has gotten the most spam comment thus far has had 99.51% of his comments caught as spam, thousands a day. (And no false positives.)
If email is any indication this is a trend that’s only going to continue. What better time to upgrade your spam protection system to Akismet?