As well as the not to be denied words of those involved, I followed in their wake a few days later and can verify many of the finds.
A couple of tips for those who may try it -
1. have LOTS of you in on it,
2. Use a sticker - none of that slow signing business!
I for one accept the record and good luck to them. It's wwaayy more than I will ever do in a day but that is fine by me.
I also think that a record is just what you make it. ie, the latest Adelaide one was the record for five (was it?) in a van, with a local driver, using stickers, etc.
I'm also not sure that Wiki is the authority on setting records? But it'll do.