Of course! Durov is a genius. First he created the best social network in the world, then one of the best messengers - Telegram. Conveniently, quickly, simple - that's what you need. Any worthy ICO is required to use Telegram for maximum feedback
Telegram is one of the best social communities today because 99% of the members are real and everything can be discussed inside the community any issues related and non related.
That's why I prefer an ICO or bounty campaigns that has a good telegram community are more successful than having no social communities.
Not every telegram has real members. I also disagree the point that 99% members are real. Maybe you should look into telegram groups more. You will find some telegram groups with 4-5 bots joining within a minute in order to claim telegram bounty if the project has.