I tried getting the 8.1 update last night and after some windows and firmware updates it was in the store, but clicking download didn't seem to do anything. This morning I could find no sign of it no matter what I did. Eventually I contacted Surface support chat and this is what they said:
"Andy the update has been removed from the store for RT devices as it is causing to [sic] much problems."
"A lot of customers are downloading the update and it causing [sic] issues that need the Surface to be replaced."
"We are working to fix those issues and as soon as that is done 8.1 will be available again."
Not sure if I'm annoyed or relieved I didn't get it.
"Andy the update has been removed from the store for RT devices as it is causing to [sic] much problems."
"A lot of customers are downloading the update and it causing [sic] issues that need the Surface to be replaced."
"We are working to fix those issues and as soon as that is done 8.1 will be available again."
Not sure if I'm annoyed or relieved I didn't get it.