Typical is as per the Annex 10 specs. If not, the facility will be failed during flight inspection. Sometimes they'll drop right down to the threshold on the edge of LOC coverage, and you are likely to have false nulls just beyond the coverage volume.
Going from outside of the coverage volume to centreline, what you are likely to see is:
1) False null (fly left/right inverted) just outside of the coverage volume. Very steep (high sensitivity), and with lots of noise.
2) Steep rise to specified levels around the edge of the coverage volume, exceeding the required value before entering. Sometimes this can be close, but usually the margin is good.
3) A constant high value as you are approaching the course sector, usually far exceeding the specifications.
4) A drop just prior to entering the course sector, within specs but sometimes getting close, again rising before you enter the course sector.
5) A linear decrease/change of sign through the course sector. For most facilities, this really is linear but in some places it can be slightly S-shaped.
The most critical points are on the edge of the coverage sector and the drop prior to entering the course sector. At no point should you see anything but full deflection when inside the coverage volume and outside of the course sector.