I have disabled the tab anymation in my install(s). This was just frustration - the tab has already changed, it's displayed on screen, but it's "slowly" fades in so I can see it.
It become too much distracting and my life is better since. Has anyone else been feeling the same? Do we have a lot of complains on this issue? If we do, this might be a good idea disabling this feature by default.