It is strain dependent. I have had a couple of autos that did really well in miracle grow potting soil. I have some now going that I did a mix with basic topsoil, coco, vermiculate, and then a little miracle grow potting soil because i'm pretty sure the top soil does not have a lot of nutrients in it. Only one plant has mild nute burn from what looks like too much Nitrogen. Once I get back from my trip this weekend i'm going to hit them with some bloom nutes, and then occasionally use the Fox Farm big bloom plant feed depending on how they take the fertilizer. I like using the big bloom feed because it adds just a fuzz of nutrients without going overkill.
Some strains are very sensitive to nutrients some suck them all up and want more. each is different and if you aren't familiar with them it is best to go with something proven. I usually use a mix of Fox Farms, half coco loco and half happy frog on a new auto strain. My experience with the ocean forest is that it is hot and I get nute burn.
I am by no means any expert. My friends really do prefer my herb though so I am pretty sure that the Fox Farm soil is a big reason why i've had success.