oops that was a misquote and I am less certain I totally agree could you fix the attribution4e has examples of what certain DC's mean... while not as exhaustive as 3e it still locks in a chunk of that color to specific DC's.
As an example...Climb has DC's listed as follows...
DC 0 Ladder
DC 10 Rope
DC 15 Uneven Surface (Cave Wall)
DC 20 Rough Surface (Brick Wall)
DC +5 Slippery Surface
DC +5 Unusually Smooth Surface