I updated to Xcode 6.1 to fix an error I was having with the Interface Builder Cocoa Touch Tool spiking to 99% CPU usage when I used the storyboard, which would freeze Xcode
If you uncheck "Use Autolayout" then it won't occur either. Though, you're back to using the old "springs and struts" method. Still, this can be set on a view controller by view controller basis so it's not too bad.