This one from your planning department confirms that optics is not the problem.
My advanced math techniques arrive at 60% of the replacements are over 3000 sq feet. And what we don't know is if this number contains all the unaccounted for houses from Planning's list. I suspect not, and my unofficial (but more accurate than official) observations over in Anderson Heights shows that the majority of replacements are getting larger in 2007 to offset the cost of the lot.
OTT has also received a report that the 2 teardowns in 2007 on Lake Boone Trail are not listed, one is an empty lot and one is a VERY LARGE new house. Your attention to what is going on in your neighborhood is urgently needed at City Hall. The data there has not caught up with reality.