So, pretty much as expected, the majority of voters who expressed a preference start at 1st level.
There is a pretty high proportion of support for starting at 3rd - a shade over a quarter. This is seemingly down to a choice to have the starting characters begin as more fully-actualised versions of the players' concepts, based on the comments.
That is interesting - thank you all for your input and feedback.
I am tempted to start level 3 for the reasons others have said, so long as the players have a firm idea of where they want to go archetype-wise and/or MC-wise. If the players are easy-osey about the eventual path the character will take, it's more likely that a 1st level start is just fine and dandy. Just wanted to gauge what others felt. Again, thanks.