Now let's use as an example a 15 x 4 prop. The angle at 75% radius would be:

Radius at 75% = 5.625in
Angle = approx 6.5 degrees.

A 15 x 5 prop (same pitch as the 5 x 5) would have a:

Radius at 75% = 5.625in
Angle = 8 degrees

So, these props aren't stalled.

From the other equations, further conclusions can be drawn.

The higher the pitch, the better the high speed performance because the relative AoA (the angle at which the air strikes the blade) is higher with higher speeds, so larger pitch props have a higher blade angle, so they take longer to achieve 0 or negative lift.
The lower the pitch, the better the static thrust because the prop is near it's most efficient stage, so it develops more thrust at this stage. But on the other hand, as speed buildups and the relative AoA takes a shorter time to equal the blade angle, thus the blade get's negative thrust at lower speeds.

I hope this clarifies what you're asking for....