That declaration is false and i haven't seen any unofficial let alone official claims that SAS are the best syndicate in CC.
They've won about half of the PvP tournaments so far but the winners of PvP get forgotten very quickly as you seem to have forgotten FC won the first couple of PvPs. How can you claim SAS are the best team in CC? We've been battling for parts of Empire City for months now, have you not checked the winners list?
Surely to claim you are the best syndicate in CC you would have to own the most parts of Empire City? By my maths they are 13 behind.
Congrats to SAS for beating us in a war but they've got a lot of work to do before they can even consider claiming the title of the best syndciate in CC.