Vedic Astrology Not Vedic?

In a shocking article, Shri Avatar Krishen Kaul, has opined that Vedic Astrology is not really Vedic. Especially the Sidereal Zodiac that we use, is not Vedic one. Contrary to that Tropical Zodiac used by Western astrologers is the one used in Vedas and most of the Vedic astrology scriptures. He also states that due to use of incorrect Ayanamsa, we are celebrating all our festivals at wrongs times. All this is supported by the facts in the article.

Have a look at the article and let me know your opinion.