This is only my conclusion from what i've noticed and wrote down, (maybe its a coincidence) its up to you to decide. Any way, what i've noticed is when i enter ready go's which are quite empty, less than 20 or so, i always score well, the average for 10 rounds which i noted down was 59 (all ready go's in which were not filled past 20). I also jotted down the ready go's i had entered after 30 had entered, the average's of these ready go's varied between 64 and 61(best), but half were withdrawn from due to shots not being right (deviation probably, things like 100 wedge in 14 mph tailwind going 96 yards etc, etc)
So my conclusion is when I enter tournaments early, i hardly get any noticeable deviation, but when i am late entering, its like all the best score's have all ready been "allocated" so this is when you get more deviation than usual. But, i mean a BIG BUT, It might be just a coincidence, but its what i found after writing down 10 results of each, early and late entrance.