No, because by losing all the other matches it was proven that the Inter win was a fluke and here the "It was the players, not the coach", which was used after every single Ranieri win against a big, mid-table or minor team, applies.
Anyway, M.G said something about Prandelli's record against Milan, Inter, Roma and Juventus.... I checked it and it's true. He won only 4 of Fiorentina's 39 matches against Inter, Milan, Juve and Roma. His record is 4-13-22 (35:61). That's a shockingly weak 1/10 success rate.
In his coaching career he won 10 of the 81 matches against the top 4 teams. His record is especially weak against Juve and Roma. He played Juve 22 times in his career and he beat us only twice. Against Roma he won only 2 of the 20 matches.
He's a little better against Milan (3 wins on 19 matches) and Inter (3 wins on 20 matches).