Our vehicles are ALL fast skimmers, with the slowest vehicles being Raider and Venom. Which are still fast compared to Rhinos etc. Tyranids mostly have Fleet but so do we, and they don't have vehicles. We will also be able to assault before Eldar thanks to open-topped, plus have you seen a Reaver turboboost? Yeah. Many of our units also have at least an 18" assault radius.
As to how to make a glass cannon assault, get lots of vehicles (Razorwings are my favourite), act like cover isn't necessary (it shouldn't be if you kill enough of them) and aim to table your opponent by turn 3. Did it with an Ork horde recently, utterly hilarious. Since so many of our vehicles can cover most of the board with firepower on turn 1 it should be possible to kill close to 50% of an opponent's army during your turn 1. Note that this only works when you have turn 1 or your opponent does next to nothing on his first turn (like if he's Orks).
Another thing on the glass cannon assault, you'll never need more than one Razorwing. I like the 1 Razorwing and 2 Ravager combo, although make sure you run your Razor with dissie cannons. I also find it helps to tell your opponent exactly what it can do first turn. If it does die before it shoots, it's usually been shot at by a lot more than 165 points worth of firepower, letting your other vehicles get closer to the enemy. A glass hammer assault SHOULD NOT be an assault orientated army, as this will cripple your chances of actually doing it (you have a maximum of 28" assault range, pivoting trick included). Kabalite armies are fun to play as, plus you can stomp an opponent in 3 turns.
Also bear in mind that the 'supersonic' rule can save the life of your Razorwing, and that you should only move at the correct time. Too early or too late and your vehicles are dead, especially if it's Grey Knights or Tyranids. Genestealer rending mauls Raiders and Ravagers.