In Chrome for Android beta they've implemented some changes that are suppose to improve scrolling, especially on large pages, and they've adjusted the tap disambiguation popup. If you don't want to use the beta these changes should filter down to the stable release at some point.
In my experience the tap disambiguation popup is worse in Beta, not better. They managed to break it so half the time when it pops up, it's empty instead of containing a zoomed version of what you tapped on so you have to tap away to dismiss it and hope it works the next time you open it.
