Noida Project Timelines: Are Advertised Dates Realistic?

What do you all think about possession timelines in Noida? Just watched this video on misleading real estate ads, and it really got me thinking. So many projects promise quick delivery, but then delays become the norm. I'm always worried about those initial ads making things sound too good to be true, especially with construction stages. Does anyone here have experience with projects where the advertised possession date was actually met? Or are significant delays just expected now?