This one had, but less than 120s after links were posted, 500 blocks were already mined by whoever knows.
Only way to do it faster than what I did is to have a 100Mb connection just next to mega.co.nz, and be lucky on the first sync.
A git clone + compilation takes at least 1mn to 2mn too, + min 30s to sync, so someone must have gotten the sources/wallet before it's published. This or those 500 blocks (2 diff retargets) were mined in 30s by a lucky guy who has a perfect connection.