Guild Wars 2 accounted for 21% of sales in the first quarter, in addition to Blade and Soul's 9%, Aion's 16%, and the usual Lineage cavalcade (Lineage 1 represented 38% of sales alone with its subscriptions).
While 64% of NCsoft's sales were in Korea, only 13% were in North America and 8% in Europe. The decrease in NA and EU contributions was due to "the reduction in Guild Wars 2 package sales," according to the report. All of NCsoft's subsidiaries posted drops in sales from last quarter except for NC Taiwan.
[Update: Also of note in the earnings call is the news that NCsoft's Nah Seong Chan says the company is "preparing an expansion pack" but has yet to decide when it might launch. Very interesting news indeed as ArenaNet said as recently as March that it was not working on an expansion. Thanks to Mike and Robert for the tips!]