transpose list of lists (summarize()) without a for loop

[#1]

Can anyone think of a way to transpose a list of lists like what comes from the following script so that each row is grouped together instead of by column. 

I know I can do it with a for loop but I'm wondering if there's anything better or less brute.  

Names default to here(1);
dt = open("$SAMPLE_DATA\Big Class.jmp");
summarize(dt, d = By(:age, :sex));

rows = nitems(d);
cols = nitems(d[1]);

show(rows, cols);

// rows = 2;
// cols = 12;

For this I want to change it from 2 lists of 12 to 12 lists of 2.  

Adding a few people that I think might either like this challenge or already have something. 

@pmroz,  @Justin_Chilton, @gzmorgan0, @msharp, @ms

[#2]

Repeat: MS your repeat solution is very nice. :)

[#3]

I had the exact same question @vince_faller .  Thanks for asking.  I've posted a request for a feature like this to be added to the next version of JMP.  Let's see...

https://community.jmp.com/t5/JMP-Wish-List/Transpose-List-of-Lists-without-a-for-loop/idi-p/348968