Not necessarily faster, but it's much less work on your part to gain XP via remote racing. I got about 4 million XP over a 20 hour period, taking me a little past halfway to lvl 39 (I was 36 when I started remote racing).
I used the 9-hour Tsukuba race to grind up to 40. I started it in the evening and again in the morning. So bob drove 18 hours a day, leaving me 6 hours to play. This was pretty much every day for 3 weeks.
I used the 9-hour Tsukuba race to grind up to 40. I started it in the evening and again in the morning. So bob drove 18 hours a day, leaving me 6 hours to play. This was pretty much every day for 3 weeks.