A few points
Deldar vehicles are *FAST* *SKIMMERS*
A fast skimmer moves 12" and still gets to fire two weapons (the ravager has a rule that lets it fire three)
A fast skimmer flat outs 18" in the shooting phase.
That gives us a range of 30" per turn.
I think the next fastest, transport is a blood angels rhino, which can move 12" and flat out 12".
However, skimmers jump over terrain, rhinos must move around or risk immobilising.
So, we are 6" faster than the next fastest, without worrying about terrain,
None fast rhinos are 12" and 6" I think.
DEldar vehicles are *OPEN TOPPED*
This means they are both assault vehicles (rare, off the top of my head, thats land raiders, storm ravens, and scout speeders), and they dont have access points, which lets us get VERY creative with where we jump out from.
DEldar themselves are *FLEET*
This lets you reroll the dice when you charge
What does this all mean.
18" flat out
10" charge (25% of pulling that off)
One (3700pts per side team) game
In two turns, I charged a unit 50" (8" charge) away and took an objective.
The space marine I was playing just looked at the board with an awesome WTF face on, (to be fair, so did his team mate, my team mate, the two people next to us, and me).
The only other thing that could do that is a 200pt Storm Raven, if it was looking the right way.
I did it in a 65pt Venom.