OK, you have a point. The CGEM drifts about one arc-second every twenty seconds, just in the declination axis, due to non orthogonality.
This is 1/60th of the performance of the Astro-Physics mount, so then I should be satisfied if my Accord has a top speed of only 4 MHP?
Five minutes of accurate unguided performance is not that unreasonable.
Unguided AP for anything but the brightest objects, fastest focal lengths and shortest exposures, particularly at this price point, is unreasonable. Depending on the scope and imaging setup, it can be unreasonable for even a much more expensive mount. Any amount of research on the CGEM would show that. I agree that about the only thing the CGEM and an AP mount have in common is that they are both telescope mounts.