I've mined close to 400 shares in the past 2 hours and balance has not been updated on the site for nearly 3 for me.
It didn't update for me at 16:00 (UTC) as well. It usually means that no block was found by the pool between 15:00 and 16:00. It should update at 17:00, if the pool finds a block within the next 48 minutes (or has found a block within the last 12 minutes).