That's not a scientific survey or anything, but even accounting for self-selection and reporting issues, those load times are very long, especially for such an old game. An anonymous Reddit poll last year found that roughly half of players were waiting three to six minutes for the game to load up, and about 35 percent of players waiting even longer to start every session.
Further Reading Take Two cancels plans to stop printing money via Grand Theft Auto Online Grand Theft Auto Online's PC load times have been a persistent issue for seven years now, remaining slow despite general improvements to hardware and the game's status as a continuing lucrative revenue stream for publisher Take Two.