ipv6 day DDoS threat?

I got an interesting contact from a large company that I will leave un-named for the moment. They said that they heard specific "chatter" about DDoS of IPv6 day participant sites and even more specifically about our website. Of course they have also offered to assist us in preventing this from affecting our site. I'm very skeptical about even calling said company at this point. I'm really feeling like this is a shakedown and was wondering if anyone else had been approached in a similar fashion? Mark Pace