I am not concerned at all. The entire crypto-space has been filled with talking, promises, whitepapers, ideas and vaporware for some time now.
Action, true development and forward progress is what matters and the NEM team is actually working.
Agree with you, Dr Charles.
XEM project and its core team have demonstrated their strong capability to meet plans on time (for most the cases).
It is worthy project to invest money in crypto world. I have actually invested into XEM, for long term investments, not short-term.