Yea, people (especially the idiots on youtube) will tell you anything they think youre dumb enough to listen to. Every car responds differently to various bolt-on's, but chances are that a turbo (at least a well engineered and designed one) is going to put out more power than a few simple bolt ons. But again, dont take that as a generalized fact because like i said, every car is different. There are some cars with such poorly designed turbos that they only make an extra 20-40 hp or so over the stock N/A version.
My turbo lag is your courtesy head start.