In a strange way, this article confuses latency with throughput. It takes a long time for each Android update to gain a majority of the installed base. But it does get there. Slowing the frequency of updates will not change that.
Android continues to develop at a fast pace. Android N previews large-tablet/desktop OS features like proper mouse support and resizeable windows. This would not be the time to slow the release schedule.
One reason I hope the tablet market grows to where it can influence the overall Android market is that tablets do not need carrier approval for updates.