NO one knows.
1-2y should be OK for ver.1.0 but ver 1.5 was released for ~1-2y only, so we still are not sire.
Just from the prototype seen, there is no change in alloy used, so the fragile point should still be there.
You should also see this topic on yesterday.
http://www.toysdaily.com/discuz/viewthread.php?tid=91276&page=1#pid3166666