We see fairly high shutter speeds (small exposure times), here is some data from one of our flights of an orchard.
RED shutter: mean - 2737.68 min - 1444.44 max - 5416.67
NIR shutter: mean - 4080.97 min - 2407.40 max - 5416.67
Here is an image showing some metadata of the red channel photos from this flight, showing:
I remember thinking at the time that the shutter speeds for the multispectral bands were pretty high, and high compared to RGB sensors.
I don't have access to the images at the moment (I'm travelling at the moment), but will take a look at this particular dataset when I get back to see if there are any of issues regarding vignetting effects with these small exposure times.