That interpolation (which isn't a lerp) is framerate dependent. On slower devices, it will be exponentially slower, on faster devices it's going to be near-instant.
Anytime you see an interpolation that does not use a time-component, that interpolation will be (wildly) different on different devices.
Anytime you see an interpolation that does not use a time-component, that interpolation will be (wildly) different on different devices.