I've gotta chime in with my two cents, simply because after many years of seeing the boys I feel that the two SOAM I heard this year (SPAC, Reading) were fantastic and possibly some of my fav moments of all time. (12/29/96 Harpua, walking after a flatbed at the Ball being a couple others.)
As a musician I really enjoy when the improvisation the band is doing strays from the usual patterns one tends to fall into even while improvising. At Reading they went"out" but there were many interesting layers of complexity going on particularly when one focused on the chord movement created by all 3 non-drummers and not just the gnarly sounds....'twas very Charles Ives but it frickin' rocked. I usually keep my mouth shut while the band is playing, but they got a "F@#$ Yeah" from me during SOAM.

...ok that was 4.5- 4.7 cents sorry