Spring loaded folder settings missing in Yosemite
It appears that these settings have been removed from the Finder preferences window.


The slider is now located in System Preferences → Accessibility → Mouse &amp; Trackpad


You can change the spring-loaded delay by writing the setting manually:

defaults write -g com.apple.springing.delay -float 1.0 &amp;&amp; killall -HUP Finder


Replace 1.0 with the delay in seconds before springing.