another good writeup with picture
Here is another analysis from IG with a fab picture where you can really see the size difference (thanks Maureen - seriously this time ;))
New research shows that X and Y sperm have the same shape and size - Gender Selection News
Dr. Shettles also describes how he looked thru the microscope and saw that "X and Y sperm were different sizes" in his book, in very great detail. We now know this to be impossible (unless Dr. Shettles maybe had some sort of superhuman sperm seeing abilities of which we are unaware) so if not capacitated and uncapacitated sperm, then what was he even seeing?