We all know by now that Tau really were a little more popular than Games Workshop thought they would be. So while this is not really breaking news, I still find it interesting that this much Tau sold so quickly in the first couple of days.
Please remember that these are rumors. GW has not made any official announcements on how many Tau have sold.
via the Faeit 212 inbox (anonymous)
the mail order delay is due to having sold 2 months worth of stock within just 2 days of preorder. Someone clearly underestimated how popular tau would be.