Sort:  

This can be handled by third-party front ends by buffering votes until 15 minutes for comments. I know certain front ends already buffer comments for 3 seconds for next block.

What about notification tools optionally delaying their notifications by 0, 7.5 or 15 minutes?

Or perhaps they could have an option to notify twice. Once for the initial appearance and a second time when votes are optimal.

That's a very good point. I guess we may see front ends offering delayed votes for self voters too.

Thank you for the heads up about the timing. I did that just before reading your post. That's why is good to read first.

Might be done as a browser-plugin replacing the votes button. Should be no big deal. But is it worth? When voting I just have the author in mind who is not affected.