Seems to load ok (not great). You could try to monitor your hosting server load by adding the following code, usually in the footer area. This will help you gauge the amount of load or "use" of the server your Zen Cart site is hosted with. Poor hosting will bring higher numbers, good/fast hosting lower numbers.

<!-- Begin Server Load -->
<?php
//GET SERVER LOADS
$loadresult = @exec('uptime');
preg_match("/averages?: ([0-9\.]+),[\s]+([0-9\.]+),[\s]+([0-9\.]+)/",$loadresult,$avgs);

//GET SERVER UPTIME
$uptime = explode(' up ', $loadresult);
$uptime = explode(',', $uptime[1]);
$uptime = $uptime[0].', '.$uptime[1];
$data .= "Server Load Averages $avgs[1], $avgs[2], $avgs[3]\n";
$data .= "Server Uptime $uptime";
echo $data;
?>
<!-- End Server Load -->

This code will show some numbers similar to:
“Server Load Averages 0.53, 1.07, 1.06 Server Uptime 182 days, 12:45”

The numbers can be interpreted as:
- during the last minute, the CPU was overloaded by 73% (1 CPU with 1.73 runnable processes, so that 0.73 processes had to wait for a turn)
- during the last 5 minutes, the CPU was underloaded 50% (no processes had to wait for a turn)
- during the last 15 minutes, the CPU was overloaded 698% (1 CPU with 7.98 runnable processes, so that 6.98 processes had to wait for a turn)
- how long the server has been continuously running
- time of request

Learn more at http://en.wikipedia.org/wiki/Load_(computing)

Hope this helps.