Yes, I do. When rendering smaller sized pictures, I've found that I'm often having a better result when lowering the denoise radius to 0,5. By smaller size I mean 2000-1800 and lower.
I must also say, that this has become my workflow since the early days of the denoiser, so I haven't made any comparing/test lately. Maybe something has changed?
Will see if I can make some new testing soon...
Regards