Is the reward of the Eclipse Prayer, which was performed with the people, attained even if the Imam did not prolong the bowing and recitation?

The eclipse prayer is a confirmed Sunnah according to the majority of scholars. What you did is sufficient, Allah willing, for fulfilling this Sunnah. It is permissible to perform it in any manner that has been reported. It has been reported that it consists of five bowings in each rak'ah, just as it has been reported that it is performed like a supererogatory prayer. You will receive the reward for the prayer you performed.