Yes. Fresh cover holds baitfish. Bass eat baitfish. Haha. Do the math. I've been doing pretty good lately pitching and flipping fresh flooded grass. Caught 17 keepers in a little under three hours last week doing this exact thing.
The only real variable I've had to contend with is water clarity. When it's muddy, it is really nessacary to pitch tight to cover. Bass will hold really tight to cover and not move too much when it's chocolate colored water. As it clears, you can start to use more movement in your presentation