I have seen some speculation about attendance numbers and whether the fan base is losing interest in the team. I compiled a few statistics to try and answer the question.
Average attendance over the past 13 years:
As you can see, the average attendance so far is on the low side (lowest since 2006), but the Jazz has seen lower averages, specially after the previous lockout when all of the NBA took an attendance hit for a couple of years.
To gauge the interest of fans, I plotted the attendance per game this season vs 2009-10, which was the last full season with Jerry Sloan before the current cluster****. I also complied the data for average attendance per game (in SLC, obviously) for the past 6 seasons to get an idea of a more generalized trend.
It might be difficult to see, but the plots match pretty well for the first 15 games or so. At that point, we see the increase in average attendance as the season matures in 2009-10 and historically. Current season does not involve any significant increase in average attendance, and the plot is overtaken by the other two. The trend lines below demonstrate this pattern.
While previous seasons followed the expected pattern of increasing averages as the seasons progressed, this season's trend line is flat. It is my assessment that the situation of dropping attendance is very real and concerning, but it is not yet catastrophic. I would be interest to see what would happen if the trade deadline passes without any changes. Current projections show a considerable drop in full season average attendance if the trend continues. It is also possible that some hold outs will lose interest and push the slope into the negative.
We'll see what happens over the next couple of weeks.
Average attendance over the past 13 years:

As you can see, the average attendance so far is on the low side (lowest since 2006), but the Jazz has seen lower averages, specially after the previous lockout when all of the NBA took an attendance hit for a couple of years.
To gauge the interest of fans, I plotted the attendance per game this season vs 2009-10, which was the last full season with Jerry Sloan before the current cluster****. I also complied the data for average attendance per game (in SLC, obviously) for the past 6 seasons to get an idea of a more generalized trend.

It might be difficult to see, but the plots match pretty well for the first 15 games or so. At that point, we see the increase in average attendance as the season matures in 2009-10 and historically. Current season does not involve any significant increase in average attendance, and the plot is overtaken by the other two. The trend lines below demonstrate this pattern.

While previous seasons followed the expected pattern of increasing averages as the seasons progressed, this season's trend line is flat. It is my assessment that the situation of dropping attendance is very real and concerning, but it is not yet catastrophic. I would be interest to see what would happen if the trade deadline passes without any changes. Current projections show a considerable drop in full season average attendance if the trend continues. It is also possible that some hold outs will lose interest and push the slope into the negative.
We'll see what happens over the next couple of weeks.