How? Massively.
The Eglinton Crosstown AM Peak arrivals at the airport are estimated to be 500 people per hour. The AM peak arrivals at Renforth westbound are 1,500 an hour, with 400 departures an hour eastbound.
The 2,000 per hour numbers aren't even related to the airport. It's only when you get east of Scarlett you get to numbers greater than 2,000. At Jane it suddenly jumps to 3,000. It's no wonder that in 2010 they moved the terminus from Pearson to Jane (and later to Mount Dennis).
Compare the 500 between Renforth and Eglinton to 2,7000 to 3,000 between Kennedy and Victoria Park.