When Federer won the 2003 final over Phil Ah Poo Sis, im sure fans must have said shit about him like "he will never win another slam, it was a fluke" etc, just as they say about Del Potro, Djokovic etc.
Or that he will be a 2 slam wonder in the mould of Never on time Hughwitt and Cafin, even though at that time those players were still 1 slam wonders.
I don't know what all
fans said, but a number of people had been expecting him to "give real trouble", to use the phrase of a friend of mine, from when he won Wimby Jr Singles. Many people were just surprised that his first slam had been so long in coming. I think it was McEnroe who said when he beat Sampras that this fellow (Roger) could win a few slams. Ay year or two later I think he said that if anyone were to beat Sampras' 14 slams, it would most likely be Federer.
So no, quite a few people who'd been following him from Juniors expected he would win multiple slams, though nobody envisaged his phenomenal success.