I don't track time spent on quilts, because it's my hobby and that wouldn't add to the fun! But I think I'm a pretty fast worker, I'm weirdly obsessed with efficiency in all things so I am constantly deconstructing tasks and figuring out ways to do them faster - what can I combine, what can I do simultaneously, what can I skip...
You guys should see me cook...my dad once commented to me that he'd "never seen someone cook with all four hands before"! (I cherish that as a huge compliment, by the way! I WISH I actually had 4 hands!) I'm always thinking 10 steps ahead; breaking steps apart if I can do parts conveniently "now" to shave a second or two "later"...it often doesn't make sense to watch what I'm doing, until you get to the end and suddenly everything is done. It's fun, for me, to be juggling so many tasks and constantly jiggering them around...cooking is a boring chore otherwise! And I get done faster AND most of the dishes are already washed before the food is even done cooking.
Sewing, though, I take more time with...it's not a chore so I relax and only use two hands at once. LOL But even so, there's a little monitor in the back of my mind pointing out where I'm wasting effort. ("If you're going to cut that, cut this too and save three minutes. If you're going to walk over there, bring this too, you'll need it in a half-hour. If you're reaching into that drawer, take out this too, you'll need it in 20 minutes. Set this next to that, they go in the same cupboard that you'll be passing on your way to the ironing table.....")