[boost] [function] Merits of drop-in replacement

I ran across http://www.codeproject.com/cpp/fastdelegate2.asp the other day. I searched the archives and didn't find any discussion about it on the list. It makes some good arguments and seems to be done pretty well, although it may have succumb to a bit of feature creep. Should those benchmarks be reran against the trunk version of Boost.Function? Thanks, Michael Marcin