I've noticed this too with tomatoes. My parents grow tomatoes in their backyard during the summer. The amount of "meat" in the backyard grown tomatoes is noticeably a lot more than store-bought tomatoes. Stock-bought tomatoes are a lot more watery. and have less "meat" in them.

Similarly, I've started buying a lot more organic fruits and vegetables. The organic strawberries have way more taste than non-organic strawberries.