I think you are underestimating the advantage of the US guilds. First, to put a number on this:
- American Realms go up at 11:00 AM PST on Tuesday = 7:00 PM GMT on Tuesday
- European Realms go up at 11:00 AM GMT on Wednesday
So we are talking about a 16 hour head start.
Looking at the rankings for the two endbosses, this would have changed the positions as Paragorn would have taken #1 on Shek'zeer (even being 10 man and all), but especially the earlier bosses in the instance would have changed a lot. You might argue that the first bosses don't count for the overall standings, but even when not changing positions this still is a problem: Wowprogress.com is giving out points based on the seconds you killed the boss after the very first kill of that particular boss, so even if the ranking would have remained the same, Method would have gotten more points for their kill (which would have been only 2 hours after BLs kill) and BL would have gotten less for their WotE kill.
About the "BL was behind in progress and had to overtake Method after Zor'lok", that might be true, but that only translates to "BL used up all their head start on Zor'lok", which does not make it less of a head start. An argument I could accept to a certain degree would be the hotfixes that were applied to Zor'lok at the same time for EU and US BUT both hotfixes went in at a time far better suited for US progression than for EU progression:
- The first Hotfix went in "shortly after" Nov 7, 13:28 PST which is around 21:30 GMT, late in the day for EU realms but early in the day for US.
- The second Hotfix went in "shortly after" Nov 8, 14:17 PST which is around 22:30 GMT, late in the day for EU realms but again early for US.
While technically they went in at the same time, the timing did fit the US guilds a lot more than it did the EU guild. For my guild (Pulse on Blackmoore-EU, GO ALLIANCE!), we read about the second hotfix at around 23:30 local time and had the option to either stay up and hope for the hotfix to go in or just call it a night, get some sleep and start again the next morning. For all we know, the hotfix went in about 30 minutes later, but we couldn't know that. I hope you see my point.
All that being said, this discussion is basically as old as WoW. It died down a bit in the last couple of years, because the last US World First was back in 2007 and so there was nothing to discuss about.