<shrugs>
Funny. I sort of feel that people stress out a little too much about the UK paperwork. I just presented exactly what I was asked to present with my application. I would be curious to see examples of American that have been denied visa based around financial reasonings. I did some research awhile back and found the general percentage of Americans that are denied visas, but they had them all lumped into the same category (visitor, spousal, wv). It would be curious to compare that to the number of Brits denied US visas. Maybe I just got lucky, but I didn't worry at all that my UK spousal visa wouldn't get approved.
I was a bit younger when we were getting our paperwork ready for the US visa, so maybe that's why I found it more complicated? I think the fact that you had to apply for the temporary work authorization and advanced parole separately (apparently it's different now, they lump it all together?) seemed confusing, and you still had to wait a month or two before those things get processed. I lived and breathed visajourney.com at the time.
Because I lived in Dallas, they had the DORA pilot program, where you did the interviewed for AOS straight away, and only had to wait 3 months before getting the greencard. Theoretically, a great thing. Except ours took 6 months. So we were in constant limbo as to whether we wanted to shell out $250 for the work authorization or wait it out for the greencard (which might have come before the work authorization).
I mostly relied on uk-yankee threads for the PETS program, which is probably a thousand more times confusing than either UK or US immigration!!