Correct. Starting cold - preferably with a Minion start, adding the meat at assembly, and with a slow temp come-up - will allow more time for smoke adherence.
There is another reason: Enzymes in the meat which are responsible for increasing tenderness during wet- or dry-aging increase their activity as conditions warm. One enzyme inactivates ~105? and the other ~120?. Maximizing the time spent at lower temps can increase tenderness.
For typical steaks one is grilling hot and fast I think it's better to allow time on the counter before cooking. Ditto for larger or thicker roasts and steaks where one is cooking at higher temps. Putting a large cold roast into a hot cooker or oven can lead to a more cooked exterior while the interior catches up. Larger or thicker roasts that are going to be cooked slowly for while before searing - think tri-tip, eye of round, et al. - are better, imo, loaded in cold in a cooker or oven at low temps.