I'd have to heartily agree with this sentiment. While oftentimes I think we do see engineers get marginalized in favor of "business" employees or designers to disastrous effect, it's important to recognize the importance of UI/UX, especially on consumer-facing products. While Apple and its extreme focus on UX is the most prominent example, many web startups have seen success due to a combination of good marketing and design (Tumblr, Facebook (vs. Myspace), Instagram, and Flipboard come immediately to mind).