Legit Reviews received the following, somewhat vague, reply from Intel. It basically shoves responsibility to the CPU cooling manufacturers:
“The design specifications and guidelines for the 6th Gen Intel Core processor using the LGA 1151 socket are unchanged from previous generations and are available for partners and 3rd party manufacturers. Intel can’t comment on 3rd party designs or their adherence to the recommended design specifications. For questions about a specific cooling product we must defer to the manufacturer.”