Unless I misread the specs, the Sutherland Timeline has a resolution of just one mark per revolution of the LP. At that low resolution the Timeline can only see a very coarse average speed.
That may suffice for basic TT setup, but it can't tell us anything about speed variations which occur and correct themselves within a single platter revolution (e.g., by averaging or cancelling). Higher resolution tools will reveal momentary stylus drag effects, motor cogging and other short duration events the Timeline can't see. You can't measure microns with a yardstick. ;-)
We use a strobe disk Paul made in Corel Draw. Like the Timeline it's small enough to use with an LP playing, to capture stylus drag effects, but it has as many marks/revolution as he could fit in without going nuts. That ennables visual observation of much shorter duration anomalies.
WRT Andrew's experiment, what he'll learn depends not only on the pitch accuracy of the test tone (as 80stech noted) but also on the resolution of the Feickert thingy, which I don't know.