Do the Herbal Concotions created by a Druid with the Herbalist ability count as potions for the purposes of abilities such as the Accelerated Drinker trait or the Alchemist discoveries Extend, Enhance, and Eternal Potion? The relevant portions of the Herbalist ability for reference:
A druid who chooses to learn druidic herbalism can use combinations of nuts, berries, dried herbs, and other natural ingredients along with appropriate containers to create herbal concoctions or magic consumables that function like potions. This acts like the Brew Potion feat, but only for spells on the druid spell list. Herbal concoctions are typically thick and sludgy, and their creation time, caster level, spell duplication capabilities, and all other variables and properties are identical to those of potions created using Brew Potion.
Since they are identical to the potions created by Brew Potion, I would say yes.