I purchased a domain on the 2015/01/27 and set the name servers immediately (I'm hosting the name servers, I provided an IP and a hostname).
It's now the 2015/01/31 and the name servers still haven't propagated correctly (I'm using nslookup with Google's public DNS servers t check, and also nwtools.com).
Is it just taking a while, or has there been some issues?