Seoul - US Passport holder, tourist visa. No problems 2 day turn-around, website said 3 days. Wanted everything; proof of funds (bank statement), travel itinerary, accommodations. I had cash with me Thai Baht and USD. I offered to show her but she didn't seem concerned and let it go.
TLDR : Answer Summary
A US passport holder applying for a tourist visa from the Thai consulate in Seoul encountered a smooth experience, with a quick 2-day turnaround despite the website stating a 3-day process. The required documentation included proof of funds, which could be shown as a bank statement or cash. In this case, the applicant had both Thai Baht and USD but was not asked to present them.