Quote 5ER, Page 7
Dice and Dice rolling, Paragraph 3
Whenever you attempt any 3d6 roll, whether an Attack roll, Skill roll, Characteristic roll, or other roll. A result of 3 (three ones) always hits or succeeds; a result of 18 (three sixes) always misses or fails. The GM sould consider giving a character some advantage when the player rolls a 3 and some disadvantage for rolling an 18.
Nowhere in the glossare is the word critical mentioned, no in the index
The Ultimate Skill P 16-17
The core dice mechanic description is changed to
A result of 3 on a skill roll always indicates a spectacular success, known as a critical success in game terms.
A result of 18 on a skill roll always indicates a spectacular failure, known as a critical failure.
This seems a stark change from the core mechanic, concidering specific bonuses and penalties, duration changes are listed.
I am well aware I could ignore said bonuses/penalties, but currently as I am new to the system as a whole, I am not aware of the changes it would do to the feel of the system as a whole.