All depends on how many other planes land at the same time, I arrived 10pm and it took longer to get to immigration then go through it , dont offer the dtac if they don't ask as its on the computer as soon as they scan your passport
yeh i said that ages ago when people where saying its going to make entry quicker , I mentioned the fact that all the things you have to answer are not asked at immigration so how is it going to be quicker and your still going to have the crazy long lines
don't ask me ask the people who make posts every day about it , doesn't matter how many times it's explained to do it within 3 days of arrival they still post asking about every day , not just on FB but on all the socials, maybe there new to Thailand and haven't had to fill out a tm6 before