Maybe at other airports pilots don't think that because their company is paying a landing fee it gives them a time share right to the runway.
If high speed taxiways were actually used as high speed taxi ways for exiting the runway rather than coming to a virtual standstill prior to vacating the rwy, pilots didn't try imposing their own wake seperation when following another heavy on dep, didn't stop on the rwy side of a holding point and report rwy vacated and generally took heed of the request on the ATIS for minimum rwy occupancy time then maybe ATC wouldn't feel the need to cajole tfc with requests to expedite etc.
There have been a large number of unecessary go arounds due to tfc being very slow in vacating the rwy or not rolling when been cleared for an immediate take off, which puts extra pressure on an already busy situation.
Please remember every time an ATCO decides to try an get a dep between 2 arrivals he is putting his licence on the line, and is totaly reliant on pilots complying with his instructions....and you can guess what sort of response we'd get from the GCAA if we had a loss of Rwy seperation because no urgency was shown in expediting the tfc by means of the use of immediate, no delay etc.