I get bit both ways.  Its probably a 75/25 split for sliding/pegged.  I usually peg when working thick coontail, and I don't feel the bait getting down through the crowns.  Sliding weights give a whole different presentation, and they do shed weeds quite well with a little shake.   Although they look similar, a pegged t-rig isn't really the same as a jig.  I've had days where the fish have shown a preference. 

[movedhere] General Bass Fishing Forum [move by] J Francho.

I used to peg...a lot.  Now, the only time I find myself using a pegged weight is in very, very thick vegetation.  Generally this is when I'm flipping directly into matted grass.  On the lake that I usually fish, having a pegged weight will almost stop you from getting bit on a standard texas rig.  There is a fairly thick layer of gunk on the bottom of the lake.  With a sliding, unpegged sinker, the weight will fall through the gunk leaving the bait sitting on top of it.

It might be good to start by answering the question: What Is A Jighead?

To my mind, a jighead is not a lure per se, but describes a Weighting System.

Instead of using a loose hook and a sliding sinker, the jighead is a glorified weighted hook

that provides a fixed union between the two. Pegging the slip sinker with a toothpick

merely simulates the behavior of a jighead.

During the descent of an unpegged T-rigged trailer, the bullet sinker always beats the trailer

to the bottom, which leaves a loose loop of line above the lure. Normally this is no big deal,

but sometimes that loose loop can be a problem in dense pondweed, hydrilla or tapegrass.

More importantly, the T-rigged trailer may not reach the bottom during a slack line descent.

Unbeknown to the angler, the lure may be suspended in weeds above the bottom

during his long pauses. This isn't possible with a jighead, because wherever the jighead goes,

so goes the trailer. Although a T-rigged plastic may land gingerly on a tussock of milfoil

above the bottom, the trailer on a jighead will crash thru the vegees as it's dragged to the bottom.

Just food for thought

Roger