Rapid-fire growth may not be all it's rumored to be especially if your company isn't ready for it or if you're not growing for the right reasons. With all the dotcoms, tech companies and IPOs, it seems that companies grow faster and faster now to keep up with the competition. Some people use it as a tool to improve the valuation of the company. Some people use it as a tool to improve the ability to recruit people. Some people use it as a tool because they want to improve their own sense of self.
Some people use it because they want to improve the way they deliver products to customers.
Of those, only the last alternative is one that is truly sustainable. The other ones will generally cause problems over time. So if you're growing for the sake of pure growth, you'll find it hard to keep people. You'll find it hard to keep valuation. You'll find it hard to keep a sense of self without going crazy.