The gentle application pressure and sinking to the floor test is about a definitive as you can get.

Just a soft pedal that sinks more initially or more than you like but hits kind of a hard stopping point before the floor usually indicates that there is still air in the system.

Even if pressure bled, I have a had two cars now that had residual air in the system after a MC replacement in spite of bench-bleeding the MC before installation. I am guessing that during pressure bleeding I forced some air down from the MC connections to the junction block where it got kind of hung up.

On the 240 with problem, driving it for a few weeks and then bleeding again solved the problem. On the Saturn, time healed the wound as I believe these bubble traveled back up to the MC and purged at a later time.