With the "humor" I've seen from some of them (namely one Brian James), believe me...it fits the usual Yuku pattern.
I think it's almost "Freudian" in a way though. Deep down, even their main supporters realize that Yuku is not exactly dominating the market (as they claimed ezboard was). In fact...they are having trouble moving their own user-base over from ezboard.
A better "April Fool's" joke (but one that would have been deleted if posted in the lobby) would be:
"Alert: Yuku development discontinued. Ezboard for sale due to declining revenues"
Who knows...that may be a future story and not an April Fool's joke.