Has the creepiness formula been somewhat accepted officially? I often see people using it to define the creepiness of a relationship, something I find very weird.
I can't answer your question, but if consenting adults are dating, how about we stay out of their business? How is it different to say "oh my God he's 40 and she's 22" than to say "oh my God, they're the same sex"?
If they can consent and did, it's nobody else's business.
Some people (not me) argue that it's not consent if the 40 year old is rich and the 22 year old isn't. The 22 year old has her free will impaired by her need to survive and if their financial situations were equal she wouldn't consent.
There are millions and millions of 22 year olds out there surviving just fine without dating a 40 year old. If that is literally the only option for literal survival then that's probably rape. Needing to get a job does not mean your free will is impaired.
I'm not sure what "officially" would mean in this context, but it's a pretty good rule of thumb which derives from what people already seem to generally think.
It has issues in the teen years, but from about age 22 onward, it seems to match well with [US] societal mores.
If they can consent and did, it's nobody else's business.