2007 X5 4.8 Surges when first started

[Ferguson]

First, understand I live in Florida where a "cold start" is about 70F.

After about 6000 miles when I first start, the car surges badly if I try to drive away. If I wait 30 seconds after starting, it is fine. When I say surge, I mean shakes passenger type surge, not just a little uneven.

It's perfect at all other times.

Dropped at dealer overnight so they could see, they say "it's the injector blowers [or something like that] on the 4.8, you need to wait a bit after starting when it gets cold". I reminded them it was Florida.

I'm never a patient person, I head out to lunch (it's not just morning), start the car and go to back out -- surge, shake, surge... annoying.

Anyone else have this? Or are other X5 drivers more patient.

PS. This was non-existent until about 5-6000 miles. The dealer claims it is because now it is winter here, and temperatures have dropped. Dropped all of maybe 10-15F. I think it changed.