The app I use on my mobile phone (A-GPS Tracker) has a couple more values in the statistic of the track to show the time you effectively walked/run (or anyway moved, so it exclude the time you wait at a closed rail crossing, for example) and use this value to calculate the average speed and so on.
It would be nice to add this values also to the statistic of GPXLab, eventually with the two set of values, the total one and the "real" one, with both average speed, min/km and so on.
Would it be possible ?