My Internet goes out occasionally, so I tend to use the reconnect feature often. Recently, whenever my Internet would go out the pop up to reconnect hasn't come up when I logged back in. I even timed how long it takes from the moment my Internet goes out to the moment I get back in. I did the a few times when I lost connection. The fasted time was ~18 seconds and the longest was ~34 seconds.
Also I have lost connection from a battle without my Internet going out. This happened twice and both times I reconnected in about ~10 seconds and I wasn't able to reconnect.
Customer support service by UserEcho