When I log in from a mobile device, it gives me that same blank gray screen that says "loading...", but at the bottom there is a link to "Exit enhanced mobile mode...". After clicking that it gives me a message that it will not use enhanced mode for 90 days (?) - too bad it isn't permanent. Then it immediately goes to the normal site and works just fine.
The enhanced mode is excruciatingly slow and when I've suffered through the wait to see anything, I haven't found that it brings anything special. Certainly not anything worth that wait.