Mine was accepted on 1/14 and I am still having the issue with WMR when I try to check the status. I can get in with one SS but cant with the other. Still just in the accepted stage. NO EIC, simple return married filed joint with 2 dependent's, no itemizations, nothing fancy... hurry up and wait!
Perhaps they processed single-filers first, and joint filers will take longer. I am a single filer, no EIC, no dependents, standard deduction, so about as basic as you can get.
I do not think that theory is correct as I filed married and have one dependant and got my refund yesterday. Not sure there is any rhyme or reason to it.