In the thread on Manifest, Ellis Dee said:
Now, despite the nature of the movie, I always thought that Quaid’s character was never abducted. That he was, in fact, nuttier than a fruitcake. The aliens had not apparently been here since the scout ship was captured. Even if they had, what would be the point of secret abductions? They were going to invade as soon as they got here no matter what.
So what say you? Really abducted, or nutcase?