Pretty sure my G41, and even my G34 can do 2.5@25.
That's nice. An accurate 1911 will do under 1" at 25 yards, and some will do under 1" at 50 yards (10 shot group, 9mm and 38 Super, according to Bullseye gun builders). I've produced 20-shot groups under 1" at 25 yards, and an average 20-shot group of under 1.7" with 10 different different overall lengths of the same load in 9mm. That's pretty consistent. Only one group exceeded 2".
The data in my previous post is based on 50-shot groups.
Polymer guns can shoot well, but they don't do as well as consistently as the pricey 1911/2011 pistols you mention. I suspect the failure of the polymer guns is the slide to frame fit, which will not match a well fit 1911. The barrels in polymer guns can be quite good, and they're only limited by how they fit the slide/frame. For the record, I have a 25-shot group from a M&P9 under 2" and a 50-shot group under 2.2", but with a properly fit aftermarket barrel (Apex Tactical), and a 10-shot group with a stock G19 under 2". So, I have nothing against polymer guns 'cause I have several, but their accuracy seldom compares to a gun built for accuracy like a 1911/2011.
The polymer gun's aren't intended to be bullseye guns, just 'combat' accurate. They can do that just fine with the right ammo. And even an accurate 1911 will shoot like crap with ammo it doesn't like. The link I posted in post #2 shows a gun that shot a 50-shot group at 25 yards at 1.91", and the worst 50-shot group was 5.92", all with factory ammo. Ammo can make a big difference.