Is it or was it ever true your allies earn more tech if you tech a couple turns a time VS say batch teching in on click?

Depends on how much tech they have you should never tech more at once then you ally has of said tech

I just have OCD where I only tech 3 fields at a time with one turn point value in each field. I could be wasting a lot of time I imagine :P

Blocks of ten turns is what I do. doesn't seem to make any difference I can see with 1 turn or multiple.

Assuming allies have enough tech so they get the benefit, since allies only get 10% of tech, you should always tech 10 turns at once for maximum benefit.

If you tech 3779 points and you tech 1 turn, each ally will receive 377 points.
Doing this 10 times will net your allies 3770 points.
If you tech 10 turns in a batch, your allies would have received 3779 points.

Your allies are potentially losing close to 1 tech point for each individual turn you tech!

I haven't been a techer before, but I figured it would round up to 378 per turn. If I sell a turret for 144 as a commie, I get 130 which is 129.6 rounded up. Maybe tech works differently then cash.

If I have 100k tech in bus and my ally has a TPT of 3k and he techs 80 turns (240,000) I will get 24,000 tech right? this is what I thought. as long as I have more tech than what my ally is giving me I should get the full amount. no?

the rule about teching in small batch's applies to FFA when you are allied to yourself, you tech around 5 turns worth of one tech or more then move to next country, and then repeat this throughout all of them in a never ending loop of time to maximize your gains from teching with yourself as ally.