I have no issues with the number 13. I actually kind of like that number.
It may be an issue for older generations who are more superstitious, but I think that kind of thinking is disappearing.
I have notice most new condos are including the 13th floor. I was told that in numerology the number 13 is actually a lucky number -- I don't know how popular numerology is or if it's one of those crazy new age practices.
The only developer I could think of that doesn't use 13 is Concord Adex, but they also removed the 4th, 14th and 24th floors on their buildings to maximize the saleability of thier projects. At Cityplace you may have a unit on the 35th floor, but it is actually on the 30th floor if include all of the skipped floors -- it's funny that it makes your unit sound taller than it actually is.
Speaking of the number 4, I may be more hesitant in buying a property with the number 4 in it because of resale as it will not appeal to Asian buyers. I had a friend who was trying to sell their condo and their unit had a 4 in it. A potential buyer, who is actually not Asian, but brought an Asian friend and Feng Shui expert along at a showing and her friend discouraged her from buying it because of the unit number. That really irratated my friend as that was only thing that prevented this lady from making an offer. I don't want the same thing to limit the saleability my property when the time comes.