I wish this nostalgic myth would die. Back in the Win 9x days we all had laughably slow spinning disks and hardly any RAM. Interfaces for simple programs like Minesweeper and Notepad were instant, sure. But anything heavy like Word, IE, Encarta, Visual Studio, etc. were definitely not.
Most of those kinds of apps are way faster now than they were in the 90s, mostly thanks to SSDs. (Visual Studio is a notable exception - they really screwed it up after 6.0.)