[Foobar8568]

One thing I wonder, if IQ would play something in this...

[jshowa3]

In general, yes. A higher IQ is correlated with handling more complexity.

[astrodust]

It's just one factor in the barrel of nonsense that standardized IQ tests are.

Chimpanzees utterly destroy people in certain memory tests: https://www.youtube.com/watch?v=JkNV0rSndJ0 That makes them exceptionally intelligent by that narrow metric.

In others they're unable to keep up with some birds.

[rcxdude]

Working memory is something which some IQ tests aim to evaluate.