From my own point of view i don't think there will be such major delay because this has been officially announced by the team for listing, this means both exchange and the team are have finalized all the legal action concerning listing so in this regard i think once the sale is over and distribution is done then there won't be much delay to be listed in the already announced exchanges.
Once the listing details are confirmed, team announced this news in public. So I am also sure that the gap between end of the ICO and listing won't be that large.
They have already confirmed that Securix tokens will be listed on FUBT.top and Latoken. So, it doesn't seem we have to wait for exchanges after the ICO.
It is nice that we already have exchanges lined up for the project to get listed at the end of tokensale period
I think this is best for investors who want to liquidate their position and cash out real fast as it is listed
Selling the the tokens that fast will likely lead to losing money. This is what has happened in most of the recent ICOs.