Did a quick turnaround several times already. Arrival at around 5 am and departure around 8 am. Luckily for me, I have not had any issues. Immigration officers looked shocked at first but when they called up their supervisors, supervisors just told them it's okay, from which I'm thinking, they have had enough mile runners so far.
I am doing another one this Friday (EWR-POS-IAH-EWR). Anybody?