If in a pew, showing up in torn jeans if just ducky. If invited to hold forth at the podium, seeking their rapt attention, doing it in torn jeans, particularly if it "under-dresses" the congregation, is a sign of disrespect. Call me old fashioned. Maybe it is in the gay in me, but sartorial presentation matters.
I doubt at brtd's church that that's under-dressing the audience. I wouldn't be surprised if people there made it a point to be as casual as possible to undermine the idea that God expects you to wear your "best" clothes, which is something I've always agreed with. Respect for your God, your pastor, your congregation, that's something proven with actions that reflect your faith, not the objects you literally use to hide yourself from the outside.
In conclusion, BRTD ought to start a nudist church.