Quoted By:
Here have some objective results
I believe that given enough time, Ash and Serena would overtake Ash and Misty, however it seems that during the early 2000s pokeshipping reached a height amourshipping has still never been able to, even despite there being a whopping ten times as many people using search engines now.
One thing I did learn from this is that more people search for ships by searching "ash and misty" than "Ashxmisty" or "pokeshipping"