Nothing up-to-date unfortunately. I scrape very little information regarding merited posts, basically because I never mastered properly the free limited scraper I use, and haven’t yet bothered to move the process over to Python (as I did for scraping user profiles). That means I do not currently have the information concerning post number within the thread.

I did do it once upon a time though a few months into the Merit System, suffering somewhat to obtain the data: Forum Merited Messages- Does size count?. Specifically, section four depicts what you are querying about, where the deeper breakdown would be necessary to explain the cases depicted on the right hand side of the chart (WO threads and such are the main accumulators in that zone). To really be meaningful, it should probably be broken-down by rank or such.