This was the claim made by Sir Terry Matthews, as Ubiquity Software became the latest startup in his universe of high-tech investments to go public in the London AIM (Alternative Investment Market) (ed. note: prior to Ubiquity, another one of Terry's companies, March Networks, also went public).  Ubiquity, which raised about $47 million in its IPO, had about $15 million worth of sales.  Sir Matthews told a group of technology executives in Ottawa late last month that the London AIM has a key tax advantage over other exchanges such as the NYSE and Nasdaq.  By holding on to a startup investment for three years, there is no tax on the gain for a company listed on AIM. 

Separate Note: Interestingly enough, Sir Terry admitted for the first time that if someone made a "big enough offer" for Mitel he would consider selling the company.