DD,
Supposedly not according to WGT who has responded to similar question in the past with reassurances that the equipment does not degrade over time (other than the balls), and the shot variance does not change over time.
The shot deviation algorithm is most likely one contributing factor, as it is designed to give random results within a pre-defined 'zone' based on your shot setup, course conditions, and meter strike.
I know it seems like it at times, but the important thing to understand is that equipment upgrades reduce these variances and make the game more consistent. By design, of course.