You are probably right, but I think that the elements which influence the season trend are much more than the type of periodization. For example my coach uses a classical periodization. In 2008 season, started the 1st of May, I ran my PB only in the last race, on July 11 on a very good track (wind + 0.5). In 2009 I ran my PB on the 1st of May, on an awful track (wind +0.0) and never improved anymore. Honestly, I never understood what causes the variation of my performance, in training and in race.