Yes, a general consensus is AGI should be able to perform any task an average human is able to perform. Definitely nothing of Nobel prize level.

A bit poorly named; not really very general. AHI would be a better name.

AAI would be enough for me, although there are people who deny intelligence of non-human animals.

Another general consensus is that humans possess general intelligence.

Yes, we do seem to have a very high opinion of ourselves.

> Yes, a general consensus is AGI should be able to perform any task an average human is able to perform.

The goalposts are regularly moved so that AI companies and their investors can claim/hype that AGI will be around in a few years. :-)

I learned the definition I provided back in mid 90s, and it hasn't really changed since then.