Christoph Maser wrote:
You can also run Linux on Apple computers.
He was advertising OSX not Apple hardware
That was not advertising. There is a big difference between advertising and a user stating a preference, presumably with reasons based on experience.
Sure, your opinion. But to me the question was "a suitable laptop for running CentOS" not "what is the best OS to run on a laptop"
And as you might have noticed, there weren't an overwhelming number of replies from people happy with their experience with CentOS on laptops. It's not unreasonable to use/recommend the best thing for the intended purpose and CentOS isn't a particularly good fit on a laptop.