[quinncom]

Exponential growth may look like a very slow increase at first, but it's still exponential growth.

[janalsncm]

Sigmoids may look like exponential growth at first, until they saturate. Early growth alone cannot distinguish between them.

[naasking]

Intelligence must be sigmoid of course, but it may not saturate until well past human intelligence.

[Garlef]

On the other hand: Perception of change might not be linear but logarithmic.

(= it might take an order of magnitude of improvements to be perceived as a substantial upgrade)

So the perceived rate of change might be linear.

It's definitely true for some things such as wealth:

- $2000 is a lot of you have $1000.

- It's a substantial improvement of you have $10000.

- It's not a lot you have $1m

- It does not matter if you have $1b

[varjag]

$2000 is not substantial over $1b on the linear scale

[gf000]

If it's exponential growth. It may just as well be some slow growth and continue to be so.