The real ale movement defines a real ale as cask (wood) conditioned. So, we are looking at about 1/2 psi of carbonation. This is flat. Homebrew is rarely this flat, but they tend to have lower carbonation levels than the yellow fizzy stuff. The measure of carbonation is by volumes of CO2. Most homebrew & craft beers will be around 1.5-2 volumes. The YFS will be around 4-5 volumes, counting on fizz and freezing the taste buds to mask the lack of flavor.
Factoid: hopping rate for Coors 1 lb per 1300 cans.