No, of course not, the ICO groups of telegram are the most shill thing that you can find. At least, there are some telegram groups about information of coins that are legit, like BitcoinBravado.
It's better you join the official group of the ico rather than these third party groups. The reason is they might be getting paid for fake ico to suggest or influence the members to invest in it
It is full of people who are always falling in those tentative offers like; join our group, and make x2 everyday, that is FAKE, and there is a lot of people paying huge subscriptions in order to join their VIP channel.
Instead you can create a thread on this forum in altcoin discussion and get opinions or join the official group as i mentioned earlier and clear your queries.
Do not join those groups guys, they are a waste of time.