They're somewhat accurate. Honestly, I'd just look at the individual placement info of each program you're interested in through their websites. Not all of them will have said info, of course, but it'll give a clearer idea. I don't know if I'd agree with anything. Grenoble doesn't offer the same opportunities as Copenhagen Business School, for example. Grenoble is like #5 in France or something and CBS is #1 in Denmark. McKinsey Denmark recruits from CBS, whereas I sure as hell doubt McKinsey France gets its students from Grenoble when there's HEC, INSEAD, ESSEC, and ESCP.
The tier 1 list in the first quote pretty much encompasses most schools with a good international reputation, I suppose, but trying to fit everything into tier lists isn't really going to get you far. It's not like American business schools. European recruiting is going to be a lot more dependent on recruiting locally due to language barriers, whereas Bain & Co. in San Fran has no problem recruiting a guy that went to Sloan.