[jordanstoner]

This is an affect that is "cheating" room simulation by adding discreet delays to emulate a room's early reflections (in a general sense). It is impossible to accurately reproduce a room's reflections without a multi-sample image, or convolution, of that room.

Although processors like these can be kitsch for "previewing" a "room," they can never be truly accurate without much more advanced gadgetry. Simply keep in mind that they are simulations and are fraught with inaccuracies (if compared to their real-world counterparts).

It would be interesting if you could sample different reflective surfaces with different amounts of treatment at different distances and speaker placements (and, for that matter, different monitors) and build a nice GUI that let's you design your room. However, even then - it's just a nice "toy," and not something that I'd rely on for accuracy.