you mean like you?
Heh, yeah my guess would be no one would really want to do it.
So I did some basic estimates, let me know if this looks on par:
Segment 1:
Opening Scene: 2 seconds
Segment 2:
Sword: 75 seconds (1:15), taken from my run to the sword.
Segment 3:
Shield: 52 seconds, taken from my old run
Segment 4:
Forest escape including owl text (bridge clip method is fastest since ocarina loses it's main purpose): 124 seconds (2:04), taken from an old test I did with the bridge clip.
To Zora's River: 29 seconds (no need for peahat superslide in such a tough segment, plus time saved is so small even if performed perfectly). I took this from an old run of mine.
Slash bushes for rupees, rock clip, get bean: 47 seconds, taken from pokey's vid, and added 7 seconds for bush slashes and set up of HESS + another 5 seconds if more rupees from rocks are needed (which is likely).
Scale river, get the 20 rupee near the octo, you'll need cucco as well: 1:00, taken from my old run + 5 seconds to get the red rupee.
Diving game to ruto bottle: 2:15, tested this myself, picked up the blue rupee near the shop on the way back up (+30 rupees - 5 from the jar and 25 for winning the diving game).
Bottle to King: 1:43
King to owl (plant bean too), to market, get 60 from bridge, DoT: 3:03, I timed this myself, this will give you 90 rupees and you can buy hylian shield
DoT Skip and become adult: 6:10, from my current run.
WE BECOME ADULT AT ~19:39
Compared to my current run at 17:06.
It takes 2:50 from pocket cucco to hookshot, including getting the hylian shield. So after 5 segments...
New way: 19:39 + whatever in segment 5 to pocket cucco
Current way: 17:06 + 2:50 + whatever in segment 5 to pocket cucco
So that's 19:56 currently and 19:39 hookshot skip way. This is after 5 segments.
~*ALL OF THE FOLLOWING IS JUST ESTIMATES*~
You will become an adult with between 10 and 19 rupees. You need 50 to fish, buy arrows, and buy deku stick. This will take a few seconds to get the red rupee by the Big Poe guy twice.
Now, assuming the play is on GCN, that means the next 3 segments (my 6, 7, and 8 ) must be combined. A deku stick must also be collected for segment 9.
That almost certainly means only one bomb drop for cube. Honestly, I'm crazy for trying to get as many bomb drops as I am...there's no way this 12 or 15 or however long it is minute segment is going to be able to do it...no way.
The cube must use the bombs in:
1) GC warp (unless you want to go back through Hyrule, but even then it's a megaflip)
2) rock on Death Mountain
3) fairy fountain explosion
4) megaflip gerudo bridge (ISG can be done on sign)
5) beamos for more bombs
Just off the top of my head:
2 superslides across hyrule: 10 seconds each
2 pressure jumps: 10 seconds each
SS from hyrule to Gerudo: about 15 seconds?
A few other smaller superslides probably add up to 10 seconds
No hookshot in Goron City: 10 seconds twice
No hookshot climb fence quickly in Kokiri forest: 10 seconds twice
buying the deku stick: 15 seconds? Even more if you have to sit through the text
You save 17 seconds from fisherman text being faster...you probably also don't lose the 20 seconds the savewarp gives since you will get to the fishing pond quicker and you may be able to get back to Kakariko before daylight (if not then it's even more time lost).
= +20 +20 +15 +10 +20 +20 +15 -17 = 1:43 added to the cube run through segment 9 (getting all the medallions). After this the runs converge. Each will have light arrows and should have one bomb left to blow up the beamos and get more.
GCN slower by 1:26 according to these calculations. Give it 30 seconds of lag in the last segment and it's still nearly a minute slower.
Someone will have to prove this incorrect (which is entirely possible) or find gerudo bridge skip no ISG on a console (good luck since a lot of TAS guys couldn't even do it with their TAS abilities). Otherwise, I'm continuing my run.