Yes, that info is correct.

I spoke to a reputable person that prepares race cars including hondas just recently. They did not even run a cooler in their DC2R and have had no problems.

Temps are apparently no probems, installing a cooler alone will cause pressure problems, especially in the top end of the engine where pressure is lowest. So yes, they will cause more harm then good and they are not needed.

I am taking my Cooler out this weekend.