I only used a couple boxes on the saturday. was shown examples of both teh Dark Sportz offerings, and the fill was better on the purple ball, also it seemed to break better. This was on the presumably cherrypicked demonstration balls. They were nice and round too.
When we got our cases the paint was a bit dimpled and many many barrel breaks/breaks near the breach.
Ended up using Draxxus for the rest of the weekend with no real issues. We used the seconds of Blaze, rolled the balls a bit to get rid of some excess oil, and remove any obvious crap balls, and overall it shot really nice.
Obviously I know about paint, grades, quality etc, but as above we were with 2 new players who wanted to ball well, on a modest budget. Pushing an extra £8 a case for some top end stuff woulda made the weekend that bit more pricey.
Anyway, it was just an observation. I only raise it as the DS bloke apparently was blaming peoples guns. Well, if that many people have issues, its obviously the paint....