User blog comment:Rappy 4187/Technical Update: October 29, 2013/@comment-1824272-20131029215710/@comment-126761-20131105144250

The switch is intended to be quite transparent to users, and will never be noticed by most (unless you happen to be trying to upload during the short maintenance windows). As for effects of the switch - it is important for long-term work, but is unlikely to have a particularly noticeable immediate impact.