Absolutely. More specifically, start your startup. Create a folder for your product and open a text editor. Immediately you'll be in the uncomfortable situation of not knowing exactly what to code first. Code a mockup page first. Don't worry- you can throw it away- just get a page that you can show to a trusted friend and say "this is how it will work". Then add in some javascript, you know, just for demonstration purposes. Then hook in some backend stuff, you know, for better demonstrations. Learn from books and tutorials only exactly what you need to push your project forward.
In a few months of this you'll learn 100x what you could learn by trying to learn generically. It's frustrating and difficult, which is exactly why you're brain will be primed to learn what you really need to learn.
At some point you'll know so much that you'll look at all your "demo" code and think- "man, this is crufty. I know enough now to do it right." That's when you build your first product (using pylons or something awesome that you've discovered out of necessity) that will be used by hundreds of thousands of people and will bring you glory and riches.
Best of luck. Did you create the folder yet? Is your text editor open with the beginning and ending html tags yet? Is your browser open to a reference to those silly thing that you feel you should know but just can't remember yet? GET TO WORK! Oh, and you're grounded from RSS feeds for 1 month until you can prove you're learning. ;)