Have you asked? I wouldn't go out of my way to let a webmaster know, I would just be annoyed. From the looks of HN replies, this is not uncommon.

a lot of people don't know what they want until its given as an option. Regardless, its exactly why A/B tests exist

It takes some effort to setup such test. There are more important things to do.

Besides - there is no point testing it now, considering that Google slowly takes away that option.

You're right -- it takes time/effort, you know your business better than anyone to figure out if it's worth testing and optimizing. However, the lack of complaints shouldn't be construed as approval or desire.