If this is a fake site then it's one of the best ones I've ever seen, but it still looks too good to be true and if it is too good then it's probably a scam.
An announcement made 3 weeks ago said that Telegram will not be having a public ICO as they have already raised enough through private sales.
https://cointelegraph.com/news/wsj-telegram-cancels-plans-to-launch-public-ico-due-to-abundance-of-funds-already-raised