In a recent blog post at this site, Tim Grey recommended the following:
You could then use the white balance tool in Lightroom or Adobe Camera Raw (or similar tools in other software) to make the gray card appear perfectly neutral, and then simply adjust the Temperature slider to shift between blue and yellow. For the “typical” photograph that would involve increasing the Temperature value to add a little warmth to the image.
After reading other questions about using a grey card on this site, I do not see anyone else recommending "adding a little warmth" back in after using the white balance tool off of a grey card. Is this a typical practice? Do grey cards produce cooler colors then most scenes require?