What they've done is drawn their categories broadly enough so that it looks impressive but is actually meaningless. It has allowed them to bold many games but without much closer inspection (such as looking at the studio), we don't know whether bold means "exclusive" or "exclusively first". And if the latter, we don't know whether that means by a day, a week, a month or a year.
I tend to buy games long after they first come out -- what do I care if it was on Xbox for a month first?