I ran the following query to see the progress of the command...

selectT.text, R.Status, R.Command, DatabaseName = db_name(R.database_id)

, R.cpu_time, R.total_elapsed_time, R.percent_complete

fromsys.dm_exec_requests R

cross apply sys.dm_exec_sql_text(R.sql_handle) T

It says 86.43314 percent complete now. But about two hours ago it was at 86.34299 percent complete. Since I just started the command yesterday evening, it seems like it must slow down near the end or something...