To some extent I agree with Zerri. The article is about upgrading. Not the OS itself.
As I recall, Vista was a h/w upgrade. You really couldn't buy it without getting a new computer. That alone would make it a 'low' initial upgrade. W7 had a few things going for it. An Upgrade was available, and generally speaking, Vista was a 'problem'. Slow it seemed and it had problems.
W7 on the other hand is sort of stable and faster than Vista. Yes,W8 upgrades are available but it is basically a paradigm change in many ways. Seemingly designed for a phone or tablet and ported back to PC's. Initially it was thought a TOUCH screen was going to be required, no, it isn't, but to do some things more mouse movement and clicks ARE required. Either that or multi-fingered keyboard combinations. Add to that this, "The difference may have little to do with the two operating systems and all to do with economics and choice: " which the article states.
As for the builder reference, hard to tell. Boutique builders may do special things a Dell or HP would not do? Over-clocking for instance. Special h/w that might have problems with drivers for W8?
Any time there is an interface or programming change, user are wary. However, businesses are worse. They don't like to mix desktops in an organization. Training and service becomes an issue. Not to mention possible manual re-writes due to different screens and interfaces and possible programming changes.
Don't forget the old adage that is used for business, don't install until the first SP is out!
I've got W7 on ONE computer. Holding off 2 more. Why? Problems... wife was the one getting it. Almost 50% of her games purchased from Gamehouse WILL NOT RUN! Other problem is Norton Ghost 15 fails, first entering the license, and supposedly with other problems that might effect the ability to really backup a drive. Norton is working on it, but it is not clear if there will be an upgrade, new version (which I'd have to buy), or switch to Norton's SSR. Luckily my wife still has her OLD XP machine on the LAN working, so I'm still alive, but if these are not fixed soon that W8 machine will become a door stop and something we'd use for testing new s/w.