I love it, a New Yorker who thinks he's an expert but gets it all wrong.
TV markets:
Combine Miami and West Palm-Ft.Pierce and they are still smaller than Dallas (which doesn't include Sherman-Denison):
http://www.nielsenmedia.com/DMAs.html
Population:
DFW was larger than those 2 combined in 2004, according to the US Census:
http://www.answers.com/topic/united-states-metropolitan-area
and growing much faster, so each year the gap widens:
http://www.urbanplanet.org/forums/index.php?act=Attach&type=post&id=2237
http://www.census.gov/population/cen2000/phc-t3/tab03.txt
Never said I was an expert, but research is good, and I didn't make my numbers up either, here's some links.
http://factfinder.census.gov/servlet/GCTTable?_bm=y&-geo_id=04000US12&-_box_head_nbr=GCT-T1-R&-ds_name=PEP_2005_EST&-_lang=en&-format=ST-2S&-_sse=on%7D
That was just for Florida, and then I broke it down to the counties, the miami metro area is just 3 counties, while the dallas metro area is 12 counties, but the populatons are still similiar.
http://www.census.gov/population/www/estimates/Estimates%20pages_final.html
At this point, instead of me defining metro areas, I just go with the usual standard defs used.
http://www.census.gov/population/cen2000/phc-t29/tab01a.pdf
You can also note the differance in area, density with minimal differance in population and factor in growth.