I am playing a Grand Campaign, patch 1.03, Austrian side.
I got a French brigade called Chevasseurs de Fischer.
This one started out with a power of 5600 or so. By the end of the campaign, his "power" and I know it is a general representation that does not completely tell his power, but his "power" was 16650. He only has a few elements. He is a single detached force.
I looked at the numbers and the units had a cohesion of 1083 or so over a 10K number.
Compared to corps that can go from 1000 to 3000 as a very high, that seems a little off.