Looks like some sort of update happened today and proper challenge mode teams (at least 3 from this server) got recognized with realm best times. Browsing, it seems that the top teams were: (* means not from our server, ** means not sure)

Gate of the Setting Sun

Haruun, Silvino**, Aroke**, Celebrimba, Wreaxhavok**

***If the above team is not a qualifying team, then the best would be

Qinglu, Mistflower, Kushuma, Lagerwell**, Qiulei

Mogu'shan Palace

Goazer, Clandestine, Dalebert, Eriaa, Rorrim

Scarlet Halls

Hípster, Vonswagert, Beauvier, Drynoxia, Filuz

Scarlet Monastery

Elgunaz, Celebrimba, Envien, Irtwaz, Oneshota*

Scholomance

Escorducarla*, Qiuyue, Dendia, Murdos*, Rhazhana

Shado-Pan Monastery

Hípster, Rïn*, Beauvier, Filuz, Melfy*

Siege of Niuzao Temple

Goazer, Clandestine, Dalebert, Eriaa, Rorrim

Stormstout Brewery

Goazer, Clandestine, Dalebert, Eriaa, Rorrim

Temple of the Jade Serpent

Rahzek*, Ekcos, Sereina, Silvrbow*, Truladin

Congratulations to all!

Source: http://us.battle.net/wow/en/challenge/dungeon/gate-of-the-setting-sun/realm/cenarion-circle/#reset
Edited by Elgunaz on 9/12/2013 9:11 AM PDT