My experience with tea bags for my 510 is that they produce a denser vapor than polyfill. That means the vapor is saturated with more juice, thus delivering a stronger hit. Unfortunately, more juice condensates in the mouth and goes to the stomach. The juice has stomach irritants and can make some of us pretty sick.
Also, if you are vaping tobacco-flavored juices, that condensating juice tastes very nasty. But for pleasant tasting juices, more condensation enhances the flavor.
The 510 normally, and with the straw mod, produces a dryer vapor. Though the dryer juice has its disadvantages, I find I don't get sick with it. Also, less condensation of juice make it ideal for the nastier tasting tobacco-flavored juices.
I tried tea bags with my 510 and they seem complicated to me. An alternative to tea bagis to own two ecigs. One being the 510 with straw mod. The other being an Npro/RN4081, which is a great ecig that delivers a dense vapor by design.
HTH,
Dave