From what i have read on different ICF companys they what the Horizontal rebar placement to alternate from one successive course to another in order to create a cage for maintaining the alignment of the vertical rebar
Do any of You do this and would it impede the concrete placement and consolidation

We do it that way to hold the vertical in place without tying. No difference in concrete placement.

On my ICF walls I will have horziontal rebar every 16" and they will be alternately staggered inside to outside so that I can drop the vertical rebar down in between them. This is shown in many ICF manufacturers installation manual detail drawings that you can download online.

Also, on my 8" below grade walls with significant backfill, I plan to shift all of the rebar toward the inside edge of the wall to provide more tensile strength to resist the pressure from the soil against the outside edge of the wall. The horizontal rebar will still be staggered inside to outside, but it along with the vertical rebar will be offset ~1" towards the inside edge of the wall, i.e. assuming the inside edge of the concrete is 0" and the outside edge is 8", the first horizontal row of rebar will be at 2", the verticals will be at 3", and the next row of horizontals will be at 4" with this pattern repeating up the wall.

My above grade 6" walls will be staggered about the center of the wall with the inside row of rebar at 2", verticals at 3", and outside row of rebar at 4".

"...would it impede the concrete placement and consolidation?"

Possibly if the size of aggregate is too large and/or you don't use the proper slump. I saved a representative 1.25" wide piece of gravel from concrete poured into the 6.25" ICF walls of a friend's home to remind me to pay particular attention to aggregate size on my projects. The form manufacturer recommended 3/8" max aggregate size for 6.25" cavities!! I saw concrete hanging up on horizontal rebar overlaps.

I poured into 4" ICFs on a small project using 3/8" aggregate and about a 6" slump and saw NO such hanging up on the rebar/ties. In this tighter space instead of doing side by side overlaps at each course I tied the rebar on top to avoid any problems. Took a bit more time to tie 'em off than just snapping into place. In the 6"+ forms I'd snap the rebar side by side with the required 40d overlap.

Use the proper size aggregate and slump.  Dave

and use a vibrator with an experienced operator. not enough and you get swiss cheese. too much and bows. leaks and blowouts.