What would you say to average annual gains topping 27%?Looking for an impressive growth stock? Well, consider ASML Holding (ASML 0.17%). It's averaged annual gains of 27.6% over the past decade, enough to turn a $3,000 investment into more than$34,000.After such torrid growth, you might wonder if the stock is now way overvalued. I'm happy to report that it doesn't appear to be. Its recent forward-looking price-to-earnings (P/E) ratio of 32 is a bit below its five-year average of 34.But should you invest in ...