It has be addressed already at social media that due of heavy traffic towards ICO site some users will face connection problems and some other kind of issues but everything will be solved without anyone to be worried about their funds. Maximum target is getting filled with speed and people are rushing this is cause of real delays and issues of different types.
I'm not sure that the heavy traffic message addresses the same issue we had. At least it is obvious that such an error can't be caused just by heavy traffic, it's a problem with web site programming. I hope they will be able to discern user identity based on the source keys, but I'm not so sure about it.