Not sure why the answer should be different?
For more years than I care to mention I've only been applying the anti-ice perf correction if the conditions warranted at the surface. i:e I've not bothered to take any account of cloud below the single engine profile. This was the way it was always taught on the various aircraft that I've flown. However one of my companies keener training FO's is now making it company policy to take into account any use of ice in the initial climb out. I accept the logic but wonder why this has never been pointed out before. I've an inkling that it's only the surface conditions that need to be taken into account, as in the wind case. It would be great if somebody could point in the direction of a "official" ref that could clarify the issue.