In an ASW19, 20 or 27 it is common practice (even mentioned in the POH) to start an aero tow with partially deployed spoilers to help keep ailerons effective at low speeds. At around 30 knots put in spoilers and move flaps from 2 to 4. Works great.

Sounds OK in theory. An engineer probably came up with the POH entry, but...
Who has time to look at the airspeed, look at the runway, tow plane and keep it all straight plus close spoilers and change flaps at a certain speed? With our clubs 260 HP towplane it all happens fast! Ailerons seem to work fine in about 3 seconds.