Yes! though this is way off topic.

I drive the car floored 80-90% of the time while not on cruise constantly for hours while towing. The x5 with my travel trailer takes full throttle to keep the vehicles going 70-75mph in 5th gear on a level surface, any inclines or head winds and its 4th gear (sometimes 3rd). Can't use 6th and maintain speed even floored unless your doing >80mph, it just looses speed and bogs, not enough torque from the engine at low rpms to keep it moving (i'm thinking of getting a tune for another 20-25lbft). BTW I average about 7-8mpg while towing. I also keep the transmission in manual mode (to keep it from constantly hunting) and keep it floored even on cruise it runs full throttle, according to torque, the instant fuel economy almost never leaves 12mpg ;-)

Trust me when you have 5000lbs 11 foot high 8 foot wide barn door behind the X5 she is working hard. I'm not worried about driving like this, think about the engine working on the autobahn, in an x5 you'd probably be running it all out too. The engines are fine done it for 10's thousands of miles. The v8 lacks a bit of bottom end when its towing, wish I had a turbo. BTW my friends X5M gets the same fuel economy while towing. BTW towing at full throttle is common.

0-60 I would estimate to be in the 15-20 second range while towing.