I am in charge of the safety of this aircraft not ATC-If I feel the need to expedite I will but at only at a safe taxy speed. The safety of the aircraft behind me is not my responsibility.
If ATC ask you to ever expedite clearing the runway try asking them if they will personally contribute to any a/c damage if you loose control of the a/c during any expeditious movement! Bet it goes real quiet on the RT!
There have been quite a few accidents were pilots have been told to expedite and got it wrong-here is the latest at Birmingham
Obviously always vacate a runway at best safe taxy speed anyway