Update: Microsoft has since said the emails were sent in error.
Not sure as to the why but Microsoft has sent out email notifications to customers in Canada and the United Kingdom informing them that their pre-ordered Surface RT tablet won't be available until November 2nd.
The email's read along the lines of,
"Thank you for ordering on msuk. The release date for the preorder product has changed. The product listed below will now be available on 02 November 2012."
We saw that Microsoft had pushed back the shipping dates for all three Surface RT options for any new orders. The mystery here is that these email notifications are being received by customers who pre-ordered their Surface on day one. Some of which were placed during the first hour.
Speculation on the "why" ranges from delays with U.K. and Canadian Customs to Microsoft holding inventory to insure brick/mortar stores have plenty of stock for the launch date. We'll reach out to Microsoft and see if we can get any clarification on things.
Thanks, everyone, for the tip!