It's a nice reply but IMHO it works only if your investors are (a subset of) your typical customer base. Do you think you can use the same approach if you're pitching a new service for, let's say wedding spouses, or even pregnant women, and you're in front of 5 alpha males?
This is GOLD. Drew probably found the competitive edge by figuring out why the investor didn't use those other file sharing service and fixed that investor's pain