@ljr I don't think the question involves an amended return. 

Client mailed his return to Austin on April 14, refund was issued June 4.  Earlier in the season, they usually took only three or four weeks.     I mailed a return to a client on February 3; she is local, so I would assume she received it February 5 and filed it February 6.  Refund was issued February 25.

I had one MFS client with non-cooperating spouse, but also a dependent (from prior relationship) where there was an issue about "every other year."  His refund took a couple months.