Not that alone. They show that that is "practical", which may be semi-new, but the main trick:

" it is the de-authentication step in the wireless setup that represents a much more accessible entry point for an intruder with the appropriate hacking tools. As part of their purported security protocols routers using WPA2 must reconnect and re-authenticate devices periodically and share a new key each time. The team points out that the de-authentication step essentially leaves a backdoor unlocked albeit temporarily."