Also, this limit may not apply to the MyLink-equipped color touch radio option. At least, I hope it doesn't, because I have one of those on order :-) ... you can count on me reporting comprehensively, when I get my Volt in a few weeks.
The documentation of track count limits on various infotainment head units and input methods has been vague, in my experience. But, I probably haven't read EVERYTHING available. Be that as it may, the manuals alone should cover such subjects comprehensively, and IMHO do not achieve that. GM could do a better job documenting what the real specifications and limitations are.