It's not enough to copy a product to get the anger. You have to achieve dominance and then stagnate. Take Google Reader for example. When it started out, Bloglines was the superior web reader. Over time and through innumerable upgrades, GR developed a fundamentally superior product.

Also, Google's thing has literally always been to launch half baked ideas, get reaction, and then iterate. All the while never charging anyone except for the eyeballs.