I have seen this now for almost all the projects. The price drops huge compared to ICO price. As the OP has said, sometimes it may take long time to reach at least ICO price. That is a big problem.
Anyone who bought at a discount now has an opportunity to get their investment back and even secure an immediate profit. It is not uncommon for the price to drop immediately to a price somewhere between the highest and lowest prices that the coin has been offered at.