Meltzer's JLA #1, which features a reference to the specific events of JUSTICE LEAGUE OF AMERICA #9 (1962), and has Superman, Wonder Woman and Batman are once again League members - which would imply the Giffen origin featuring absurdities like Black Canary as a founding member are no longer in play, and the original Gardner Fox/Sekowsky stories ARE.
I shed no tears that JLA: YEAR ONE is no longer in canon. It was an interesting story, and had a lot of fun details, yet at the same time a great disservice was done to the JLA when their original stories were no longer how things "really" happened. Imagine if someone was to say that the Fantastic Four's first eight years with Stan Lee and Jack Kirby didn't happen and their "real" origin was not the Lee/Kirby/Ayers tale, but one created by Gerry Conway in 1987.
Can we assume that Steve Englehart's addition to the original JLA origin, in JLA #144 (1977) about paranoia about alien invasion is now canon? The story was further referenced in GREEN LANTERN CORPS #209.
Is Triumph still a part of League history? God, I hope not. One appearance by him was one appearance too many. Though if Triumph the Insult Comic Dog was a founding member of the Justice League, that would officially be the GREATEST. RETCON. EVER!