Facebook for Windows Phone 2.5

An update to Facebook for Windows Phone (version 2.5) was announced over 3 weeks ago. This update was to bring, among other features, threaded group messaging. Facebook Chat works greats in the Messaging app but it does not allow for Facebook Group Messages. You can send offline Facebook Messages but receiving Messages from offline users is still a no go. The update is yet to be pushed out. https://www.facebook.com/permalink.php?story_fbid=351802811542698&id=332837726772540

They mentioned an issue with Facebook Groups on May 8: https://www.facebook.com/permalink.php?story_fbid=362230237166622&id=332837726772540

Anyway, still no update. What gives? What's a reasonable time for apps to take from announcement to update? My take is within a week, anything longer is too long to look forward to.