OK... that explains it. I still haven't finished watching season 5 (waiting for my sons to get back from Vegas to watch it all together)... it's a family addiction, you see.
I got Season 1 for Christmas and I watched it all within about 32 clock hours. I slept for a few hours between Disc 4 and Disc 5.
Season 1 wasn't as intense as Season 5, but watching the whole thing in such a short period of time was still an adrenaline pumping experience.
If they kill Chloe, 24 is over for me.
(Yeah, sure, I say that now.)