Actually I am expecting that the distribution tomorrow goes as planned, there will be no more delays.
A couple of reasons for them to stick to plan B:

- They can't say anything about exchanges, because their under NDA. The exchanges in question (Kraken, Bittrex, etc) have a their own planning. All is depedent on one another, and my guess is that they don't want to put to much pressure on Kraken and possibly other NDA's
- If it's being delayed longer, the investors lose some trust
- Ethereum's network is being spammed yes, but if you update the client ~ or start with a clean chain-data and use the fast option it is possible to sync.