I disagree.
It cant be all about delivering to where you think your team mate will be. We have that in passing right now all over the pitch and its a mess. It's not just about hit and hope. The best wingers/wing backs get their head up and make sure they deliver to the spot - and with the right height and speed - where their team mate attacking the ball WILL be when he arrives for the ball. They're not just aimoing for space, they make an assessment of trajectory and distance of whatver gap an attacker has to make up when the ball is delievered.
Of course, that ^^^ overcomplicates what is an instinctive and largely unthinking bit of team play. Nevertheless, the best will always have speed, distance, angle etc all computed but do it instinctively. Digne fits that bill for me: his delivery is smooth and instinctive. There's nothing forced about it. It is a sight to behold, and it doesn't compare to the laboured delivery of others...including Baines.
I never said 'hit and hope', those are words you are using.
What I said is exactly what you said but in a different way. The best are looking for a 'spot' or an 'area'. You are right about height and speed as well.
I would also add that the players and coaches talk about this and have defined plans, i.e. There will be times where Digne or A.N. Other will have a bit of time and will see Walcott drifting to the far post so that we will be where they will pin point a deep cross or if they don't have time and they are at the by-line then try to hit the penalty spot where the pre-planned run is being made by the centre forward.
What I was getting at (mainly with the term 'majority') is that the players are looking for the right ball without necessarily looking to pin point a player, as you seemed to intimate in your original post.
There is a lot of similarities between Digne & Baines in all round play. What Baines was good at was getting a bit of whip on the ball (hence why his direct free kicks were so good) from the by-line. At his height it was when the likes of Cahill & Fellaini would be attacking the ball from deep.