Most interesting to see this old thread again Wayne! Its been over a decade, and indeed how appropriate to 'revive' the thoughts of good old Dracula on Halloween!
Actually the article from Heritage arms was I believe by Stuart Bates, Cathey Brimage is the editor of the publication.
While a bit tenuous, the topic associating the notorious Vlad with the mameluke saber is of course viable in certain remotely connected facts in some degree.
However in most cases such likelihood is about as plausible as the much debated connection between Vlad III (1431-1477) and Bram Stoker's famed vampire. Naturally there are certain possibly connected elements, again in degree.
The evolution of sword forms is mostly speculative chronologically, and that of the 'saber' is pretty well veiled. It seems generally held that curved blades evolved somewhere in Central Asia, probably Turkmenistan to give some sort of geographic reference, keeping in mind that the nomadic tribal people of the Steppes were the likely users of them, and around 9th century.
It is unclear exactly when this design arose with the Turkic tribes that formed the Ottoman empire, but these were not of course in the manner exactly of the later shamshir types, nor the stout shorter blades with yelman known as 'pala'. It seems that some sort of curved saber (as with falchions in Europe) was in use, but these may have been as with many falchions, straight backed with radiused edge to the point.
By the time of Vlad, while there were certainly some type of curved blade swords contemporary, there is no evidence I have ever seen of his using one. I have seen apocryphal sources noting him having a 'Toledo' blade , which in this time would have been of course, a 'knightly' broadsword. We know that straight broadswords were in use in Eastern Europe in these times, but there was a slightly curved version with a kind of 'S' shaped crossguard in use as well.
The 'Ottoman' style shamshirs and the similarly hilted 'pala' did not evolve until considerably later, though we know such sabers were in use by 17th century, and the East Europeans, adopted Ottoman styled swords.