While this is definitely a valid criticism, I'd urge you to read this post: http://posts.richoakley.com/post/rocket-internet-respect which argues that we, as entrepreneurs, have a lot to learn from the way Rocket has managed to execute so phenomenally well in each of the developing markets it has targeted.
Especially given a few recent posts on HN detailing failed attempts at startups, I think the above post highlights the importance of being able to consistently execute in a business.