The correct instruction to the judges is, "9 is excellent, 5 is average and 2 is just bad, we will start at 6 and judge up or down based on how you, the judge, feel about the entry". A 1 or DQ can only be given by the KCBS Rep and they will give you the correct way to score the entry.
This being the first season under the new guidelines it is not surprising that the scores are all over the board. It use to be that a total score of mid 700s would be needed to win a lot of competitions, now a score in the 630 to 650 range can get the job done.
The old system you would start at nine and take a point off if you found a problem with the entry, the range was 9-8-7 this leads to a large number of ties and that's the reason for the change to the new starting point and instructions.