I think in-game time should be used (or sum of times for a full run). Otherwise different hardware can get you different times.
thx, i'll look into that
at least on my hardware the timer seems to run in realtime
While I definitely agree with this, there's also something else I've noticed with the time. The "miliseconds" are in base 60, so you can never get a time of xy.61 to xy.99 in a run.