According to Apples Information the iPads should not be affected.
Apple Support Document:
With a low battery state of charge, a higher chemical age, or colder
temperatures, users are more likely to experience unexpected
shutdowns. In extreme cases, shutdowns can occur more frequently,
thereby rendering the device unreliable or unusable. iOS 10.2.1
(Released January 2017) includes updates for previous models of iPhone
to prevent them from unexpectedly shutting down. This includes a
feature for iPhone 6, iPhone 6 Plus, iPhone 6s, iPhone 6s Plus, and
iPhone SE to dynamically manage the instantaneous performance peaks,
only when needed, to prevent the device from unexpectedly shutting
down. This capability was also extended to iPhone 7 and iPhone 7 Plus
with iOS 11.2, and we will continue improving our power management
feature in the future. This feature's only intent is to prevent
unexpected shutdowns so that the iPhone can still be used.
So the feature (or issue as some see it) is not present on the iPad.
The iPad under the circumstances that the battery can't deliver the necessary power would shut down and not try to throttle performance.