I've noticed in my new 2010 LR2, that it seems to shift differently from cars I've driven.

Say you are driving down a hill on the interstate and you take your foot off the accelerator. Normally a car would shift to a higher gear with less resistance/lower RPMs, and you would start to accelerate while coasting down the hill.

My LR2 will stay in that same gear, which slows the car a little bit. After 5 seconds or so it will then shift to a gear of less resistance and I will then gain some speed.

2 things...is this normal or anything I should be worried about? What controls when the shift takes place? Is the engine intentionally doing the braking for me?

Thanks
Kevin