Boogie, I've had scores come back all over the place and comment cards would've really helped. I've also had helpful cards, and some that were bizarre and showed how little the judge knew and didnt tell me why he/she didnt like it... So, for me, all over the chart.
I think they can be VERY helpful, particularly to the newer cooks or those doing a "test run" if you will. But, they're only as good as they are accurate. Telling someone not to use lighterfluid when they dont use lighterfluid, or telling them how to cook, is goofy and stupid. However, saying something like "it tastes or smells like petroleum" is much better. Who knows, they may not have used any but their smoker may wreak of it...
I like them, I think they can be very helpful, but in their current way they're largely useless...
Hance - Lake Dogs Cooking Team - MiM/MBN/GBA CBJ and comp cook
Lake Sinclair, GA (strategically about an hour from darn near anywhere)
Started competing in chili cookoffs back in the 1990's and have competed in more than I care to count. I became a CBJ in MiM in 2005, then MBN and in GBA in 2010. I've probably judged 130+- BBQ comps (sanctioned and unsanctioned) over this time. That said, I really enjoy competing more than I enjoy judging, and hope to get back to doing 4 or 5 a year in the near future.