They haven't shipped yet.
According to a post by rudbear dated May 4th, if all goes well it should ship next week. I assume that proxies will need additional time, so one extra week on top of the initial ship date maybe.
A quote from a post made yesterday on reddit:
"I'm working with a tentative shipping date of May 18th as we've got bubble mailers, labels, materials, and all that sorted out, I think."