The ratings for the first 3 games of the NBA Finals have been released through the Remote Control Blog on Toronto.com. If anyone needed further proof why basketball gets stuck behind hockey and baseball on nightly highlight shows, here it is.
Game 1: 291, 000
Game 2: 435, 000
Game 3: 414, 000
Now, none of these games went head-to-head with the Stanley Cup Final. Game 1 did go head-to-head with the Blue Jays and got beat. The Jays game vs. Cleveland drew 561, 000 on Sportsnet.
Of course these games were also available on ABC, but even if you assume that half of the viewers watched on ABC (which seems like a high guess to me), none of the games would have cracked 1 million viewers.