I feel like I'm being robbed every month now that I read how fast is the Internet in Polska,
People in Britain have the same problem. Because the phone lines were so bad in Communist times, Poland had to replace them - and obviously they've done it with the latest technology. In UK, US etc, lines have been fairly well maintained over the years and didn't need such radical changes. The phenomenon is called something like leapfrog technology.
It does depend on the area you're in, even in Poland. I used to get 25 Mbps in Wola through UPS, but couldn't even get a broadband connection through TPSA when I lived in Mokotów. Something to do with the building.