Following Episode 7, Netkeiba, a Japanese website devoted to Horse Racing, reported that their page about Silence Suzuka (the horse, born 1994, died 1998) has risen to number 1 in hits.
Expanding on the earlier point, the anime ended up promoting Japanese horse racing or just horse racing in general more instead of the mobile game as intended on the international stage, if the huge amount of Reality vs Anime comparison videos of the races surfacing on the internet is anything to go by. Not to mention judging by the more recent comments, Youtube videos of the featured races became dominated by viewers who admitted to having this anime act their gateway to the world of horse racing especially in the 1998Tenno Sho. And that's not counting the huge amount of examples in the shout outs page that casual fans never knew about until the anime aired...
Harpo Does Something Funny: The voice actress for Gold Ship mentioned that she has to adlib at lot of Gold Ship's background chattering. For instance, in Episode 8, when they went to make wishes during hatsumode (the Japanese New Year ceremony), the final part Gold Ship's wish was not specified in the script. (It ended up being a nice tirade starting with "that orange juice starts coming out of faucets"). Seeing as Gold Ship is quite spontaneous and goofy, this sounds like a mild form of Enforced Method Acting.
I Knew It!: Anybody who knew about the actual Silence Suzuka guessed that its anime counterpart would suffer a leg injury. It happened in episode 7.