4 ms·

It's been awhile since I've retested this on Windows; it may have been fixed recently, and it also might be touchpad-manufacturer specific.

• nkkollaw 8y ago
  Your test only works if ctrl + scroll is associated with zooming.
• TomMarius 8y ago
  It's been working correctly since 2013 on my Thinkpad T530. Ctrl+scroll zooming is definitely enabled, I use it regularly. I use the Windows Update-supplied driver.