Please bear in mind that the site has advertising and is partly supported by *gasp* Gilliette. Specifically, the advertising promotes the Gillette Fusion. Something to consider.All ...
Check out this site:
http://www.dermatologycare.ca/shaving.php
On the page "The basics of shaving for men ..." (http://www.dermatologycare.ca/1/may-27.php) is the following statement:
"...Using a razor with multiple blades not only cuts down on the number of strokes needed, but it also reduces the potential for irritation to occur ..."