I've seen plenty name brands used and plenty cheapest-off-the-shelf used. The cheap keystone jacks always seemed to take longer because of how flimsy they are. I once had to re-punch almost a 1/3 of about 30 jacks installed in a call center room over a couple months time.
Interesting that Ortronics isn't even mentioned. In the commercial IT industry they are almost considered the gold standard, use them for patch panels and keystone jacks exclusively.
Problem with going cheep all the way is you get the cheep CAT5 (copper clad aluminum) and then you get the cheep jacks and all of a sudden you get >50% failure on certification testing:-( Had this on a commercial office complex job with over 500 wall plates, luckily you could re-punch and get things "working" but no way would it pass a gigabit certification.
We had the Fluke Reps in and we certified some of the skinny cheap Cat6 patch cables we had lying around and they would not even pass Cat5 standards. We stopped using them to prevent any issues but at the same time, we have had no issues when using the patch cables in the field.
I think its pretty easy to guess how many people "reaching for the flavor of the week" do testing... Passing a wire map is doable with cheepy-cheep but that's about it.
I have to admit we will bend the rules when installing cameras. Going somewhat over the 100 meter limit on CAT5e runs, using inferior components for cameras is almost always not an issue because in real life the camera boots up and you can get a video stream out of it, trying to certify that same cable for 1000Mbps is another question entirely.