The only XDX positions moving to RTP are technical SME or Mgmt. That's why there aren't many moving.
The actual "hands on keyboards" will be hired in RTP, trained and supervised by the SME's and initially managed by the mgmt staff that goes.
Once the SME's have passed along a sufficient amount of their technical knowledge they'll either be asked to go back to a "hands on keyboard" developer or BSA position, or be let go.
Look at what's happening everywhere else in the company with HCL. Why would you think XDX isn't doing the exact same thing with cheaper RTP resources? And I would not be surprised if RTP ends up being 80% staffed by HCL onshore resources.
They aren't moving the operations to RTP for the scenery and warmer weather. They're doing it to save money.