Electronic Shutter and the R3, are the benefits limited?

[Kayaker72]

Jason...that is as ugly as a rolling shutter example as I have seen. Yikes.

As for the R3, here is an example supplied by Canon:

As already calculated above, gold heads are moving fast...a pretty extreme case. But, Canon has made significant strides lately. I've played with it a bit and have not noticed a rolling shutter effect with the R5, and the R3 is reportedly much better.