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This is another excellent point from our resident razor point history buff Jimbo.

As far as I remember the Irish got stuck with the whachmacallit point - serves them right for preferring the...

This is obviously wrong, it is sextuple... Here's the reference:
http://upload.wikimedia.org/wikipedia/commons/0/0c/Irish_clover.jpg

The teetotalers who see it double are the american-irish who...

I believe the "dagger point" was immortalized by Shakespeare, among many others, but he also used the name "Danish point" to signify the rottenness of the state of said razor.