How can I disable the delay + minimum distance when deleting icons from the Dock by dragging in Mountain Lion?
Even if there was a hidden preference for it, at least I wasn't able to find one. If someone knows other ways to search for hidden preferences, post a reply to How to explore more defaults write tweaks on OS X?.

strings cannot be used with the binaries of a few applications like Dock, Finder, Safari, or Transmit. According to an answer to Why does the Dock executable not yield any useful strings, unlike other OS X apps?, they might be encrypted by Dont Steal Mac OS X.kext.

I didn't find anything with gdb or by running strings on framework binaries either. Others might still give both of those a shot though.