Never been to Noma. Take these BEST lists with a grain of salt. Just look at the rankings and if you know these places you can see some unusual placements. In any case, how do you determine if a place should be #1 or #5... so subjective.
Regarding El Bulli... I've been there 4 times over the years. My last meal, last month, was without a doubt the best meal I've ever had there... stunning. Ferran is firing on ALL cylinders. Most noticeably, the service has been bumped up to a level that matches the food... brilliant. Amazing that the place is at it's all time high IMO only to close at the end of July.
El Bulli closing got you down... not to worry... Ferran's much more accessible collaboration with his brother and 2 others on a new place that just opened this month in Barcelona called Tickets (and the tapas bar next door, 41 Degrees) is an amazing, more casual, less expensive spot where their food shines... and some very "El Bulli"-like plates abound.
Ferran's philosophy of bringing his food to a less "elite" crowd... where it doesn't cost an arm and a leg... where you don't have to beg for reservations (by the way, you book on-line)... is in evidence here. 2 fantastic spots!!
From looking on line, I see that reservations at Tickets is already tough to impossible, somewhat easier at 41 Degrees. Don't discount 41 Degrees... this spot, is a smaller space, but still killer!
Check out the wild design of these places on their web site...
The OPs link is broken but assuming it was to some mention of the San Pellegrino awards then SP's website explains how the voting takes place.
In essence, a panel of some 800 "respected judges" across the world casting their votes for places in their own, and other, geographical regions.
2011 results are out in a couple of weeks, I think