Well, that list is for consecutive weeks. Since I posted it, it has not altered significantly, although one or two Phoenix guilds have probably made their way into it by now. If I remember, I can put a revised list in the OP this weekend.
I CAN make a top 10 list of total weeks as #1 guild, but it will only be complete back to October 16th 2010, as the two years of GRBs prior to that would be before I started keeping records and were unfortunately never kept consistent track of (at least that I know of).
That said, the #1 ranks of the first half year or so of GRBs would be somewhat misguiding to have included in such a list even if I had the data, since back then your GRB score of the current week would be added to your GRB scores of all the previous weeks, making the total accumulation of points the basis of your guild's rank. I think (but might recall wrongly) that this was changed to the current system with the arrival of Ep4 in May(ish) 2009.