Today went pretty well, all things considered. It was draining to know that I didn't have backup to trade shifts with me if it took Gwen a long time to fall asleep, but I was determined not to sabotage our progress so far by confusing her and changing techniques. Here are the results:
Up for 3 hours in morning: cried for 27 minutes: slept for 40 minutes
Up for 2.25 hours: cried for 17 minutes: slept for 40 minutes (damn that 40minute hump)
Up for 2.75 hours: cried for 14 minutes: slept for 2.5 hours
That last nap would be the glitch. She got up from her second nap at 1:05, and from then until 7pm (bedtime) was way too long to be awake; plus, she showed me signs of tiredness around 3pm. Figuring she'd have another 40-minute doze, I put her down at 3:30 and she fell asleep at 3:45.
She didn't wake up until 6:10. Which is when we are usually feeding her dinner.
So yeah, not sure what the rest of the night is going to look like now! We're going to give her dinner shortly after 7, then do bathtime and the rest of the bedtime routine, aiming to put her down around 8. Hopefully she'll be tired enough to go for it, or we may be in for way more than 14 minutes worth of crying.