So I couldn't help myself and I tested the agitation. Not the best carpet for that. Height adjustment can't be too low or it will cut the airflow down. I think it worked quite well.
Just a note: I always set my brushroll to #2 or approx. 1/8 inch past the rugplate. This works best on my medium pile carpet.
Note #2: I own a Kirby Dirtmeter and I have found it to be a wonderful tool to help determine how much dirt is left behind by any vacuum cleaner. Here is a link to the same company you got your Baird meter from:
When I got mine they threw in a pack of 50 black and 50 white test pads. You can also use coffee filters but they clog up faster than the actual test pads do.
Those dirt meters aren't too expensive at all. More reliable way to tell how much dirt there still is. My current way with the bagless vacuum isn't the best. Problem is that the dirt gets jammed in different places in the bin. Also static charge makes the dirt to get caught in the bin.