A friend had both the 05 and 06 old glory and said he liked the 06 much better.
Guess that would be me, so you know my opinion of the issue. Though I would like to say that the 05 OG feels the same as the 06 OG with speed mods I do not think it is the case. Keep in mind that I was/am comparing a 70 pound 05 model backed down to 60 as opposed to a 60 pound 06 OG at peak weight. The 06 OG at 60 pounds feel different than last year's. The draw cycle feels like it requires less effort though I would not call it "smooth" necessarily.