I believe most ski instructors are full of praise for each small accomplishment made by their clients. I believe most friends are truly happy and full of praise when our buddies make incremental advancement. My third grade teacher had nothing but praise for my meager accomplishments. I accepted them and felt good about my new success, but I knew where my capabilities fit when compared to others around me. I suspect most people do. So continue the praise when an advance is made. BUT, put it all in context. "Nice turn, that's great, -- by extending your outside leg and keeping your flow down the hill you accomplished a nice finish to that turn." Now it would be great to continue that into the next turn". Think about achieving a movement starting with rolling your ankles into the next turn" or "pointing your knees into the next turn" or, or, whatever. Who really cares if the client has a long long way to go to achieve god like movements.
At the same time I really tire of someone telling me how good they are (true or not). For some reason, it comes of as bragging and I would rather hear and talk about something else. Most people can only listen to self-praise for about 5 seconds, then tune out.
I remember the day my grandson took his first steps. The hugs, the praise, the high-fives. We put him down, he had a big smile and went about practicing his new skill. We should all be babes.