yep brett doesn't make the glycerol I believe I heard it on the Chad Yakobson presentation. As far as the all brett I think a brown porter might work better than a all brett stout. But I personally prefer all stouts to have a huge body.
Trying to pick up all the nuggets of Chad's knowledge scattered around the internet is hard. Is this from the youtube from the Music City presentation? Haven't watched most of that yet.
Stout might be hard to pull off with all brett. Chad has said he thinks roasted barley and very dark malts result in very astringent or acrid mouthfeel & flavor in a brett beer. I brewed a beer with brett C that was planned as a Belgian style stout. Not what I got, it's very tart, lots of red fruit. For reference my recipe was:
11 lb Riverbend Heritage Malt (6row, vienna-ish)
1.5 lb Flaked Barley
.75 lb Special B
.75 lb CaraPils - wanted more variety of fermentables w/out adding more dark malt and I wanted to use it up
.75 lb Castle de-bittered Black
.25 lb Roasted Barley
1 lb Dark syrup - not sure why I used this, guessing it was because I do in my belgian stout. Will re-brew without for comparison
1/2 oz Brewer's Gold - first wort. In a tea ball, removed at start of boil
Pitched wlp 645 stepped up twice in 1.5l starters, maybe 200ml thick slurry, but my note taking was sub-par on this one. I'd imagaine you'll get less flavor with higher pitching rates.
1.060 OG, 1.008 FG @ bottling. Bottled 5 days ago. I'm trying to wait at least another week to pop one.