Regularly average 28 mpg on my short commute. The 2.5, like most engines I guess, is far more economical once warmed up. Early trip it will hover around 21 but then average 28 on a typical trip. Got almost 32 mpg average on a trip from Cornwall to the Midlands a few weeks back, not bad for an auto.
Hired a 1.8 Mondeo in Scotland last week which only did 33mpg on A roads with steady driving (speed cameras everywhere and traffic)...... that was surprising and great ammunition for use against the anti-4x4 lobby!