Delhi infra projects: Are we seeing real impact?

Did a site visit near Dwarka Sector 21 for a 2BHK. Builder hyped IGI Airport Expansion and UER-II connectivity, promising huge price jumps. I work in real estate, but even I'm skeptical about these timelines. They promise completion, but Delhi infra projects always get delayed. Are these rapid appreciation claims for Metro Phase IV and UER-II areas just builder hype? What's the actual ground reality for investment near these corridors? Should I wait?