I got my Pulse 2 in 1 shorts yesterday, and I'm kind of questioning the size. I've never tried anything from LLL to compare to, but I wear a Medium in all my other athletic bottoms: tri shorts, Under Armor shorts, Sugoi tights, CB tights, etc. So I got the medium, and... they're pretty big.
On one hand, they definitely won't hug my mini-muffin top, so I could wear them with just a sports bra all summer, which is kind of a nice thought. Things with tight waistbands make me self conscious about that. On the other hand, I think I might rely the drawstring, and the under-layer definitely isn't compressing anything.
Does it sound like I want to size down? Or should I stick with what I've got? There's no Athleta near me, so if I want the smalls it'll be another week or so.
What size of jeans do you wear? I'm usually about a 4/27 and like you, generally wear a medium in shorts. I just couldn't get the pulse shorts to work for me though, I was in between sizes (small and medium) and they just didn't seem quite right. If in doubt though, I prefer my shorts a smudge big rather than a smudge small.
Sorry, this is probably unhelpful. I did just buy a couple of pairs of Brooks shorts that I've been happy with - they have free shipping and free returns - try them out!