Not surprised at all actually, and I can give you some background. I just retired last June after spending the last two decades of my sales career in the 3M Automotive Aftermarket Division which obviously included Meguiars. I've done head to head testing of all the Meguiar's, 3M, and competitive products and spent a week or more each year in formal training sessions at 3M Center in St. Paul, MN which included all the product development and marketers being present to update us on exactly how the products had been updated. The material in claybar, BTW comes from basically one supplier (until their patent and/or mining rights run out)in the world which makes them all nearly the same. A few of the nonabrasive wax/quick detailer products are identical in the Meguiars and 3M lines, just with different names/scent/packaging. None of the dedicated(non-cleaner wax)Meguiars polishes or compounds work as quickly as the corresponding 3M products but that is by design so a do-it-yourself can't get himself in trouble as quickly. Burning through the clearcoat is not received well for a DIY'er or for the professional at a body shop since it requires a trip back to the paint booth for more clearcoat. Meguiars compounds and polishes are slower but still get the job done and are equal or superior to any other brand, even ones that are charging more. 3M as a company spends more in R&D each year than the gross profits of any company in the world making polishes/waxes.
The really fun products that work super fast for paint correction are the Trizact 3000 and 5000 grit sanding discs but most people don't have the training or guts to take 6" DA sander to the hood of their new car and instantly watch their clearcoat turn hazy. 10 years ago I had a surgeon that wanted to see the process almost have a coronary when he saw me doing that first step on the door of his black 750il BMW, lol.
Part of my job was training professional automotive techs at body shops and the trainers at large regional Automotive Paint Training centers how to repair the vehicle from grinding discs before Bondo application all the way to the last step which is the paint finishing/correction after it leaves the paint booth. I've worn out several Dewalt, Makita, and 3M rotary buffers doing demos in the last 20 years and currently own 4 rotary and 3 orbital buffers. I've pretty much seen it all when it comes to any product used in the collision repair market(our division had 4,000 products for the body shop and many part number are permanently etched in my brain), including how different brands of factory and aftermarket clearcoats respond to different products and techniques when new or fully cured.
I may have opened up a can of worms with this revelation. Don't count on fast responses to all questions, lol! Most of the dozens of instructional videos can be found on the 3M Automotive Aftermarket/collision repair Youtube channel. Here's one on complete paint finishing for those who are interested.
https://www.youtube.com/watch?v=mkwFD6gXqhw
And one from Meguairs that is more for the DIY'er.
https://www.youtube.com/watch?v=GGwVmdH_3S0