TL;DR Previously rules required you to start at tutorial explaining why so many runs do so. These rules are changed and now you can start at training which is faster.

There was a rule change a while back that changed the rules of Any% to be more in line with what Any% means - to beat the game as fast as possible without any restrictions. Previously the rules required you to start an Any% run at tutorial, but upon reviewing the rules, I removed that restriction so now you just need to complete the game as fast as possible. I didn't retime previous runs that started at tutorial because you can complete the game starting at tutorial or training, so those runs started at tutorial, and thus I decided not to retime them so that they would start at training. However, most new runs still start at tutorial so I'm just making this forum post to inform people that you can start at either tutorial or training, and obviously training is the faster choice.