What builders don't tell about Noida Ext infra delays

What's the real story with the timelines for Noida Extension's major infrastructure projects? I'm looking at places in Knowledge Park 5 and Sector 150, and builders are all pushing the Jewar Airport and FNG Expressway completion dates as immediate value drivers. I work in real estate, but buying for myself, I know what marketing spin sounds like. Is the Aqua Line Metro extension really on track? I'm worried about getting stuck with high EMIs if appreciation takes longer than promised due to delays. Should I factor in another 2-3 years for these projects? What's your experience with actual project delivery vs. promised dates? Hope this helps others thinking about ROI.