First off.....welcome to T-Nation and congrats on getting serious about training. Waterbury knows his shit that's for sure...you could do far worse than to follow his programs.
150 at 15 to 20% BF? you must not be very tall?
If you're serious about getting bigger and stronger, I highly suggest eating more than 2400 calories. Maybe keep your current diet but supplement it with some more nuts, peanut butter, whole milk, etc to get some more cals in.
As for your two week assessment.....if you're eating enough you can definitely get stronger....I don't think you'll see a huge jump in scale weight though.
What will you do when you hit your not-so-lofty goal of a whopping 170 lbs? This is why I was thinking about your height....if you're 5ft tall than 170 sub 10%bf would look pretty jacked, although certainly more abercrombie than beast-like. However if you're taller than that, than 170lbs is not big by any standards.
I'd put money on it though, that if you really stick to it and actually start eating for size, then once you reach 170 you won't want to stop. You'll look at yourself and think...."Man I need bigger shoulders/pecs/triceps/etc"
again...welcome to T-Nation you are so lucky to have found it at your age. Read all the past articles you can from guys like Waterbury, Christian Thibadeau, Dave Tate, Chris Shugart etc,.