I share a bit of different opinion on this whole bench-marking thing related to Slackware.
IMHO majority of new Slackware users are those who are done with other so called user friendly distros and have some kind of sense and hands on of practical Linux usage. Now they want something which is trsansparent and simple(may not be easy).
For those people, these benchmarks don't hold a candle, they'll keep using Slackware because they have already done their own benchmarking and they're serious this time.
Regards.