Not true. Unless you can remove the material 100% with the leading edge, and you can't, a cross hatch is very much the thing one should hope to see. Even when grinding, where the pattern may be hard to discern. No cross hatch, the surface isn't flat. Pretty simple.
If nothing else, the tops of the mountains created by the feed rate versus the radius of the cutting tool will get clipped by the trailing edge, creating the same depth valley as was created by the leading edge. That automatically creates a cross hatch.
I am at a loss to understand why it would be important for a cylinder head to not have a cross hatch. What possible reason would could there possibly be? Perhaps someone can enlighten me. Sounds to me more like an old wife's tale than anything. A perfectly flat surface in contact with another perfectly flat surface will provide an excellent seal. Think of the attraction achieved by Hoke blocks.
Assuming it's true that cross hatch is not permissible, it's quite easy to accomplish. The tilt of the head by a half thou will create the condition required, assuming a fine feed and the bearings provide the required thrust, and they should. I've never struggled eliminating cross hatch--but I have struggled getting it to be consistent. A statement about the lack of straightness of the common milling machine bed and table.
H