My 8g v2 players have been on the :16 firmware since i purchased them.[have 2x v2 and 1x +]
I installed the latest :35 on one and compared them.
I use the V2 models solely with my amp ETY ER4 combo.
I was surprised that i could hear a difference, was not really expecting too.
The :35 firmware player seemed to be slightly cleaner and more punchy less bloom or shade in the lower registers,
closer to the clip+.
The :16 player appeared to sound slightly more subtle in tonal shading.[related to LF handling]
Whether this is related to any pitch correction or the affects of how it was corrected , no idea.
The pitch issue was never a conscious issue with me. [though technically it bothered me a little]
Not sure which i prefer, but as i cannot tell by looking which player has which firmware it will be interesting to see
whether i find myself gravitating to one or the other. [both players have much the same music on them at the mo]