The term AAA originated from marketers to describe high-profile, big budget games. While so-called AAA games are expected to score highly, they don't always do. Likewise, lower profile, lower budget "sleeper hits" may score highly, but would not be considered AAA.
I'd say that it's appropriated to use the term AAA to refer to a game that has a big budget and is anticipated to score highly. The score itself isn't the measure, it's the budget and the expectation.
Overuse of any expression dilutes its meaning. Please try to choose your words more carefully.







