Or perhaps we've spent the past few weeks furiously improving performance so we can ship this genpop, and we chose to ship during downtraffic times to give extra insurance the feature would improve speed rather than degrade it.
Are you saying the last one was not an accident either?
Only reason I thought this was an accident is because there was no blog post about it. Usually Github introduces it's every single improvement[1] on it's blog. Compared to them this definitely deserves an introduction.
No deploy is on accident.