That first vid is a previous model that's been modified. I think i've met that bloke on one of our "falconxr6turbo" forum night runs.
My car is a ZF equipped auto so only makes the flutter and whoosh noise when quickly snapping off the throttle.

The current FG model has been out for 2.5 years and when the press tested them they were able to repeatedly pull 5.1 for 0-62mph (two people in car, full tank and A/C on !). When mine was stock I had a best 1/4 time of 12.89. Best that I know of is a flat 12.6