1kW may not seem like much but remember that this is electric power, available from essentially 0 rpm (unlike the 8 hp the main engine has which it only gets to at 6500 rpm, which on a Filano probably happens only around 100km/h). I recently rode a Chinese electric bike that only has 2kW total power, and the acceleration from standstill is crazy good for such a small bike. I have not tried Grand Filano Hybrid myself but I don't see why the same logic would not apply there.