I'm also awaiting the release of Peer Plays as an investor (in one of my first couple ICOs).  

I'd like to offer my .02 (for what it's worth), from someone who's been skeptical of ICOs; but also from a fairly early investor in both BitCoin ($110) & Ethereum ($5).....

PeerPlays seemed to have a good plan in place, quality developers committed, and a timeline with specific dates outlines.  So, in that sense, the checks and balances appeared to be there.  

When it comes to all ICOs in general, one of the biggest concerns/risks (if not, THE biggest) is actual launch....
(1) Will it actually take place at all
(2) Will it take place on schedule as promised.  

Of course a 7-day delay is going to raise concerns with investors, especially when the delay wasn't actually announced until the day of the proposed launch.  Limited communication from the creators will also lead to added concerns. 

Others have noted that some launch delays are somewhat "normal".   But, IMO, it's worth noting that ICO's are a fairly new concept in the eyes of many investors, as well as potential investors.  Therefore, I'm not entirely sure it's been fully established as to what's "normal" when it comes to ICOs (successful ones, reputable ones, or otherwise).  The sample size is limited (when it comes to long term success)

In the end, nothing is going to change the fact that when someone invests in an ICO, they entrusting their money with the people initiating the offering; and they're trusting those people to meet their promises.  Most investors would assume that a team of quality developers should be able to accurately forecast (give or take a few days) when a launch will take place (based on many factors)

It's only natural that several delays in the promised launch date, will lead to;
(1) less confidence in the people who initiated that particular offering  
(2) less confidence that their money is in good hands
(3) less confidence in the overall ICO market in the future (due to the lack of recourse investors have if the creators don't follow through).  

As I said, I'm not sure if anyone can confidently state as to what is (or isn't) "normal".  In the end, I truly believe precedents are being set, for better or for worse.  When it comes to Peer Plays, I hope a good one is being set; and that there are no further delays.