That's correct. The turkey won't brown in the electric roaster and I've used Alton's method and find it to be wonderful.
I have a big 18-quart electric roaster and I most often use it to bake my sides such as sweet potato casserole, green bean casserole, etc. because the roaster is large enough to hold several dishes at once. Then, once they are done, I leave the roaster on low/warm and place a wire rack on top of my sides and place my rolls to warm them up. I've had as many as 4 dishes and a dozen rolls there, which frees my oven up very well.
I also employ my large toaster oven for other dishes when I need even more cooking/baking space.
"As a girl I had zero interest in the stove." - Julia Child
This is real inspiration. Look what Julia became!