A quick update released alongside some larger Wii U firmware.
http://www.nintendoworldreport.com/news/32706
3DS Firmware Version 4.5.0-10U became available tonight around the same time as the Wii U's latest firmware upgrade.
According to Nintendo's website, the update further improves system stability as well as enhances the user experience. Those probing the update files have found that further blocks to DS flash cards were added, and the Nintendo Zone hotspot list was updated.
As reported earlier, the eShop is down for maintenance. After this update, it is still down. UPDATE 9:08 p.m. ET - The 3DS eShop is up now, but nothing is visibly changed.
More information on this 3DS update may be coming soon, so check back with Nintendo World Report soon. And remember, a Nintendo Direct hits tomorrow.
"Enhances user experience"
I wish Nintendo would go into a little bit more detail with their descriptions. It's sort of insulting to me.
Aps seem to be running faster for my xl after the update , this update was really quick too like less than a minute to download . So entering and quitting aps goes smoother and faster. Can't confirm anything else newHahaha placebo effect.