Yes, that is very clear, IEO who is in a large exchange is definitely better than IEO who is in a bad exchange, because this concerns the reputation of the exchange and the reputation of the team that made IEO itself.
But the project developers must provide a lot of money if want to make IEO on a large Exchange like Binance, Okex, or Huobi. I think that is the reason why many Devs make their IEO on Exchange small, like p2pb2b, Latoken etc. They only pay a little money for an IEO there.