Did I miss some news about visa exempt arrivals? A friend arrived to Thailand from the US in late December and was stamped in for 90 days. I thought you only received 60 days now and could go to immigration to extend it another 30 days.
TLDR : Answer Summary
There seems to be confusion regarding the visa exemptions for arrivals in Thailand, especially concerning the duration of stay. Normally, travelers from the US only receive a 60-day stamp upon arrival, which can be extended by 30 days at an immigration office. However, some countries are eligible for a 90-day stamp upon arrival. According to community comments, if your friend's passport is from one of the five countries that receive a 90-day visa waiver (Argentina, Brazil, Chile, Peru, or South Korea), they may be correctly stamped. If they are not from one of these countries and received a 90-day stamp, it may be a mistake, and they should get it corrected at an immigration office.