By far my car is the fastest option.

My commute is 13.5 miles by bike, and 13-17 depending on the route I take in my car. Pretty much any of the driving routes take me 30-35 minutes (25 if a miracle occurs and I hit all the lights). Just yesterday, I set a personal record for the bike commute, getting there in 57 minutes (the first sub-hour commute ever). Now, I'm still fairly new to cycling, and my climbing leaves a lot to be desired (though I have to cross a valley to get to work and back, so I'm getting plenty of practice), but I doubt I'll ever be able to shave 30 minutes off of that time...

In addition, it takes longer to get out of the house with the bike. I need to pack my panniers or messenger bag depending on which bike I'm riding. I need to decide if I'm taking my vest or not based on the morning forecast. I need to strap on helmet, gloves, etc. I need to make sure I've got my sunglasses for eye protection. I need to be sure my laptop is secure if I'm taking it with me. I need to be sure to eat breakfast before I leave so I don't run out of juice on the climb in. I need to be sure to bring water just in case I get thirsty, and so on.

I can, however, get across town faster than even the express bus.