Jess, No. If the temps are up and fed frequently they can molt frequently and grow much faster. You'll likely find more than you need on this subject by using the search function. Good luck and welcome aboard.
P.S. I wouldn't have a clue of the age of your spider in years. However, if you are certain of size and sex it does sound like an adult female to me.
All you have to do is lift her up and look on the bottom of her abdomen and count how many rings there is on it. Each ring is a year.....hahah I'm just joking but Terry pretty much nailed it on the head
If it's wild caught, you could approximate using the lowest estimate on when females of that species mature in the wild. Going off the estimate that Aphonopelma spp. in the Southwest mature around 7-10 years, I can reasonably say that the adult females I've caught are ~10 years at the least. 5 probably not, 20+ doubtful, but possible, given that they're wild.
That's completely excluding possible variations in their environments, like an abnormally long monsoon season that increases prey availability. Something like periodical cicadas would throw off the estimate completely wherever their range overlaps tarantulas' every 17 years.
I still have some G. rosea slings that I hatched out back in October... Almost a year later.. They are not even 1" yet.. I powerfeed them to.. As much as they want.. Keep them at 80-90 degrees F... Growing super slow... SUPERRRR SLOOOOWW......