Yes, I believe it does make a difference if you play well. The lengh of the game only affects how many opportunities you get to 'impress'. Or make a total fuck up of it.
My first bal warm up game went quite averagely & my stats were mainly in the 60's. When I restarted (the first was just a tester...:erm

I got 7.5 & scored 2 goals & set up 2 others. As a consequence I started with my attacking stats in the 70's and stamina at 83 (a blessing to be sure).