I'm not concerned about a few seconds difference in startup time, or a minute or two even. But the interactive startup tends to cause the game to start out using more RAM than otherwise, which is why we do not recommend it. It may not be much in the overall scheme of things, I've seen increases of 200-300 MB. But no matter what kind of system we have, we all have a 32-bit imposed 4 GB limit on the game and getting to it faster has never been a goal of mine.
Besides, I wash my dishes while the game is starting up and I do not have a dishwasher. I've got the cleanest dishes in town now, though. ;)