kiddush hachodesh for Sivan -- after Shavuos

Even though many poskim write that kiddush levana should be done as early in the month as possible so long as three days after the molad have passed (not like the opinion of the Mechaber who holds that seven days must pass), R' Shlomo Kluger in Chochmas Shlomo (on S.A. 424) writes that kiddush lavana for Sivan should be delayed until after Shavuos. The reason: All of creation was hanging in the balance and waiting to see if the Jewish people would accept the Torah and thereby "ratify" the purpose and need for the universe's existance (Avodah Zarah 3). It is therefore better to wait until after the celebration of kabbalas haTorah which affirmed the creation of our world and its moon before reciting kiddush levana.