You would be able to speed up the start of fermentation even more by using a little Light DME instead of Corn Sugar. As yeast multiplies it adapts to what nutrients are available to it so it can thrive in its environment. So if you start it with Corn Sugar and then pitch that there is some extra lag time while it adapts to your wort. Using DME makes this adaptation time much shorter because it doesn't have to change much to start full on fermentation.
Hope what I said makes sense as I'm not the best at perfectly explaining things
