What is the obsession with top loaders?
The US and Australia are much bigger countries than the UK with more space. They're also newer than we are, thus the houses are newer. In the UK, we have a lot of people in a small place and houses are much smaller and older, many pre-date the existence of washing machines.
In the US and Australia, most houses are built with utility room/laundry rooms or big basements to put big top loading machines in. Remember, traditionally in the UK, washers were kept in the kitchen and went under the worktop to save space, purely because there was nowhere else to put it.
In mainland Europe, washers can usually be found in the bathroom rather than the kitchen, but the same principal applies. All our old houses were never built with such appliances in mind because they didn't exist.
Top loaders do wash a lot quicker, but they're much harshers on clothes, use way too much water (hence they're quicker) and don't spin as fast. The maximum spin you can get on a US toploader is 850rpm, whereas frontloaders go up to 1600rpm.