I think the chances are less than 1 in 100 that AC would have a tech who could set up an AC instance on a SQL Standard version. I think this would be past their technical knowledge. Not only that, increased performance or not, doing so has generally voided your warranty.
They also have literally hundreds of these installs to do, and they are excited to get everyone on the same setup. If users wish to change to SQL Standard or Enterprise versions on their own after, I imagine they don't care.
