Most DF speed runners are generally bad players who can't find real speed runs. Exceptions with some, like me and my healer friend who can turn normal runs up a notch for quickies, with newer dps that still have clue on what they are doing.

On a different note after running so many runs quickly, you kind of lose good judgement on what is possible with newbies and what requires a good geared group. An example is almost every party I have been with can do the Tonberries, birds, and bugs at the start in one pull, but the pull with skeletons and the ghost can really do in some healers, despite me thinking it is an easy pull.