My old T switched to electronic records and started using an iPad for his notes. I found it to be very annoying, but I also got annoyed with the writing on paper....I guess I feel like the iPad is way more distracting to me. I think you should mention how distracting it is for you when T is looking at the tablet the entire session and if they seem disinterested in what you're saying...mention that too. You have every right to tell them how annoyed you are. It's your session, your money, and your time.