No, they're correct, Turbo is the one that is noticeably inferior. It shows especially with more complicated answers where it's prone to give you an answer with "... (fill in the blank)" type lacunas exactly where the meat of it is supposed to be.
1. an unfilled space; a gap. "the journal has filled a lacuna in Middle Eastern studies"
2. (ANATOMY) a cavity or depression, especially in bone.
Thank you for this new word!