Update : we're working on both extending a-time and W2S.. sometimes she'll stay up for 1h45 - sometimes at 1h30 she starts to fall asleep in play mat or swing, so i just put her in bed.
W2S has not been a success yet.. i've tried going in at 25-30 min, i don't feel like i stir her too much, but she often ends up waking up fully 5 minutes later. Otherwise, she'll still wake up at the 45 minute mark.. she's had one longer nap (60 min) this afternoon without any help. Staying with her to try getting her through the transition hasn't worked either.. she doesn't really jolt, but just stirs herself awake and as soon as she opens her eyes and sees us, she seems ready to play ! she doesn't like a dummy much either so if i try it, she fights it instead of being soothed.
i have to say i don't know what to make of all this... the fact she's happy when she wakes up makes me thinks she's UT, but the A-time of 1h30 really seems to suit her better with falling asleep easily, without much crying, if any, and sometimes even falling asleep while playing.. and in the stroller, she'll normally sleep for 2 more hours so i figure she needs it..? and not a chronic short napper..?