In Time Trials mode of Mario Kart, focusing on karts with high Speed stats is vital for overcoming developer times and community records. Acceleration and Handling are less crucial in this mode, where players only compete against the clock and not against other racers.
Excitement around the Moo Moo Cow was immediate after Nintendo revealed it was a playable character, and now that the racer is out, we can see the impact of its popularity in any given Mario Kart race.