[dovedescending]

I couldn't tell by looking at the pics on the website http://www.simplyrugged.com/store/sourdough.html...

Are the IWB straps adjustable for depth of carry? I would prefer that my cylinder rode just above my belt, with just the barrel down my pants. It's just more comfortable to carry without a big fat cylinder adding an inch and half to my waist size.

[The Lone Haranguer]

Are the IWB straps adjustable for depth of carry?

That is a good question, since in this photo ...
http://www.simplyrugged.com/store/img/sourdough12_lg.jpg
...the holster almost rides under the wearer's armpit. I cannot discern any multiple attachment points for the straps, which would be necessary to provide any adjustability. I would suggest calling or e-mailing them directly.

I would prefer that my cylinder rode just above my belt, with just the barrel down my pants. It's just more comfortable to carry without a big fat cylinder adding an inch and half to my waist size.
Depending on your height and build, this may or may not result in the grip riding so high that you have to put your elbow up to your ear to draw the gun. ;)

[JTQ]

There is only one hole for each strap.

http://www.simplyrugged.com/store/index.html

I suppose you could ask them to position the hole in a different spot.

[WNC Seabee]

I find that the Simply Rugged rides high enough for the cylinder to clear the waistband. I have one for an SP101 and a GP100.

[David E]

You could also cobble together some hardware to utilize the belt slot. This would allow you to tighten the loop anywhere along the slot, top to bottom.

[dovedescending]

David E, good call. Seabee, in light of TLH's comment about elbows and ears, how do you feel about carrying high-ride? Do you find it terribly uncomfortable to have to reach so high for your grip?