I think it can be depending on the way you use it. It allows you to instantly see if something is worth attention or not. If not, push the button on pebble and the notification will remain open on your phone. This means you will be reminded to respond when you do have the opportunity to get your phone out. I mute my phone, Pebble is all I use for disturbance and it is less severe than a phone.

If the pebble would do 3G an I could answer calls? I think I'd even hardly ever use my phone anymore.