No problem. I've been reading about a lot of this stuff, recently. Short version, US ship steam plants in WWII were decades ahead of everyone else. They were more powerful, more efficient, more advanced, more reliable, smaller, more damage resistant, easier to maintain, and safer than a comparable plant in another nation's ship. It's really incredible and not something I believed at first, but it's basically true.
The British had led the world with their Parsons steam turbines for years, but their technology had not really advanced much since WWI. Institutionally, British shipbuilding industry (and, consequently, the Royal Navy) was very resistant to any major propulsion changes. By contrast, the US had seen many advances in the commercial sector with its powerplants throughout the 1920s and 1930s and Admiral Bowen pushed to incorporate these advances in the various classes of US ships that were built in the 1930s. Through these somewhat experimental efforts in the decade before WWII, the US was able to establish the formula that would serve them so well during the war. Other nations, like Germany and Japan, would experiment with some of these high-pressure, high-temperature plants during the war, but they were very unreliable, negating their advantages. They were also less efficient and
far more dangerous in operation.
Some of this development is covered here, but it's also addressed in a few good books if you want some recommendations.
Steam Technology & the Dawn of "High Steam"Cheers,
Logan