You seem to be a very unlucky guy. I had the "additional security check" two times so far. Both times it was about an hour an not very pleasant, but acceptable. Concerning the laptop-story: This girl seem to be either very naive, or she is not telling the whole story. She entered from Egypt with a Syrian stamp in her passport (bad idea), she had a handdrawn map of downtown Jerusalem in her pocket, a Palestinian "tourist guide", an Arab sticker on the Laptop. If I would be a masochist with a favor for long questioning, that would be the 1on1 I would follow. Enter Syria or Iran with a Israeli stamp in your passport, a "Jewish guidebook" and a Zionist sticker on your computer and you won't get away with two hours of questioning. Blowing up the laptop was certainly an overreaction, but she did everything in her power to get into problems.
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from the article: Police shoot U.S. student's laptop upon entry to Israel