Is this for real? aruche must be Ashley's favorite
Here's a few thoughts.
I can usually guess when Ashley is going to make a release as he suddenly becomes VERY active in the Bugs section, trying to squash as many as possible.
The release also nearly always takes place on a Friday.
So my guess is some people could be using 'Auto Refresh' hacks on a potential URL - i.e. the next should be 'https://www.scirra.com/construct2/releases/r170' - and this means they will nearly always be the first to get the release.
It should be easy enough for Tom to check if this is happening, and if so, stomp on it very hard!