All depends on how many BTC are raised. If it is a bloated ICO raising anywhere > 10K BTC there will be little return for ico investors.

For ICO investors to have massive returns the ICO has to raise < 10K BTC.

I miss the old days when ICO lasted for only a week or were limited to a reasonable amount of BTC. Currently every noob know about every ICO and there are no buyers left when the coin hits exchange a week after finishing ICO.