Just the fact that riding a bicycle got more attractive and 25% more people are using their bicycles now means that there will be less people left stuck in traffic in their cars. Not to mention the people who are exercising by using their bicycles will have health benefits as well.
Will 25% more cyclists have much of an impact on the number of cars on the road? 25% more of a small number is still a small number.
I don't know what the overall daily ride count is now. About 5 years ago it was something like 90K trips/day, and had been on a more or less linear growth path.