I visited a bunch of traditionalists in the spring of 09 (G Conterno, F Rinaldi, G Rinaldi, G Mascarello, Cavallotto, Giacosa). Aside from Giacosa, I was told that 04 was like 01, excellent and on the riper/fuller side. 05 was also very good, a bit fresher, perhaps more like 99, and that 06, 07 and 08 were more difficult but could produce good wines with work.
I have been surprised to see everyone stateside hyping 06 over 05. The 05's I tasted were pretty excellent across the board and I've been buying them happily. The few 06's and 07's I sampled were also very good, but I wouldn't say that 06 stood out compared to 05 or 07 to any degree at all...