Obviously, Vegas is a tourism driven town. But they are still the size of San Jose when it comes to locals.
Not really.
San Jose (city) - 964,695 (10th largest city in US)
Las Vegas (city) - 567,641 (#28)
San Jose (MSA/CSA) - 1,839,700 (#31) / 7,427,757 (#6)
Las Vegas (MSA/CSA) - 1,902,834 (#30) / 1,947,068 (#25)
San Jose is the largest city in the Bay Area - the 6th largest metro area in the US.
Due to historical reasons - going back to when San Jose was largely an agricultural region - the US Census Bureau arbitrarily splits the Bay Area into two MSAs (San Francisco-Oakland-Fremont, CA MSA & San Jose-Sunnyvale-Santa Clara, CA MSA).
The Sharks draw from significantly more than just the San Jose MSA (which is basically just Santa Clara County). While the whole Bay Area CSA (San Jose-San Francisco-Oakland, CA CSA) may overstate the Sharks market - the 4 counties which provide the bulk of the Sharks fanbase (Santa Clara, San Mateo, Alameda, San Francisco) have a combined population of ~5M.
This is a bit of a pet peeve of mine. I live ~16 miles from the HP Pavilion/Downtown San Jose. If I move 1/2 mile further north, suddenly I would no longer be in the San Jose metro area (according to people who blindly look at the MSA boundries). There are people who live ~10 miles from the Tank (in Fremont, Alameda Co) who are not counted in the San Jose MSA.