"There's still considerable Barnett Shale leasing activity in Tarrant County, but it's a fraction of what occurred during the leasing frenzy of 2007 and 2008, and lease offers are far less attractive because of low natural gas prices.
...
The current leasing volume is less than one-fifth that of peak months during the spring and summer of 2008, when skyrocketing natural gas prices at one point topped $13 per 1,000 cubic feet, compared with today's prices of about $4.

A record-high 18,198 leases were filed in May 2008 in Tarrant County.

Much of the current activity includes energy companies "filling in the unleased acreage in drilling units" and leasing properties where leases have expired, Powell [Powell Shale Digest] said.
...
Typical lease offers might be $2,000 to $3,000 per acre for bonuses and 20 to 22 percent for royalty rates, Powell said. That's a huge drop from bonuses of $25,000 to $30,000 an acre and royalties of 25 to 27 percent before gas prices began cratering late in 2008. ..."

http://www.star-telegram.com/2011/08/15/3292509/gas-lease-prices-de...

Note:  The area of Tioga County is 27% greater than Tarrant County.  The population of Tarrant County is 1.8M. 

..