Quickest in the pits...

[shiny side up!]

Article from F1-Live:
http://f1.racing-live.com/en/headlin...13181730.shtml

Basically states that Renault is consistently the fastest team in the pits, especially in the last two races:

Spain - fastest pit stops:
J. Trulli - 20'997 - lap 9
F. Alonso - 21'427 - lap 8
F. Alonso - 21'816 - lap 25
R. Schumacher - 21'879 - lap 10
J. Trulli - 21'900 - lap 23

San Marino - fastest pit stops:
F. Alonso - 22'619 - lap 48
J. Trulli - 23'019 - lap 46
O. Panis - 23'538 - lap 26
F. Alonso - 23'617 - lap 30
J. Trulli - 23'685 - lap 31

Which got me wondering a little bit... why are they consistently quicker? The traditional bottleneck in a pitstop is the refueling, as that takes longer than the other operations (tire changing, wing adjustment) under normal circumstances. So, what is different in their refueling?

The fuel delivery rig is the same as everyone else's (or it should be!), so it seems to me it is down to either:

A) their pitstop techinique is phenomenal
or
B) their fuel tank design is unique
or
C) they are using less fuel than everyone else (engine less thirsty)

Anybody have any other takes on this?