In my experience, it really depends on what the fish are looking for and how they're taking.
I've had days where the fish want the 'mid dead still and when a breeze would come up making some chop or movement I wouldn't get any takes. Then I've had days of just the opposite, where I had to slowly move the 'mid before a fish would strike. Along with this, there are days where the takes are so very subtle that if there's too much water movement on top I'd end up missing a lot of them.
Generally, though, if the fish aren't super picky I find that a bit of topwater disturbance gives the fish a bit more comfort and they're more willing to feed. I also find that a slight breeze moving the chironomid through an arc gives me a warm-fuzzy that I'm covering more water (not sure whether that's any benefit at all, but it makes me feel better).