Arrived again at Suvarnabhumi today at 7pm. Extremely long lines at immigration. It took me 90 minutes (!) to get to the I/O. The people in front of me where all asked a question or two and my booth was moving much slower than the one next to me. However, when it was finally my turn, I received my third DTV entry in a year, no questions asked. It took about two minutes. Hope, this helps.