Is Linux currently at a fundamental disadvantage owing to how computers are set up?

When you, Joe or Mary user, buy a computer at Best Buy or Computer Village or order a computer from Dell or Gateway, you get a computer with a system already installed. Do you think they had any trouble installing that system on that computer? Do you think that if Dell sells Mary a computer with Windows installed and they sell Joe a computer with Linux installed, that Dell had a differentially hard time installing one of those systems compared to the other?