They're random, with a limit of 5 by default. See reboot_get_testimonials.php
If you'd prefer the most recent displayed, with a limit of 10, replace...
Code:
$qry = "SELECT * FROM reboot_testimonials WHERE approved='Y' ORDER BY RAND() LIMIT 5";
With...
Code:
$qry = "SELECT * FROM reboot_testimonials WHERE approved='Y' ORDER BY added DESC LIMIT 10";
If you only want 10 star reviews displayed, use...
Code:
$qry = "SELECT * FROM reboot_testimonials WHERE approved='Y' AND rating='10' ORDER BY added DESC LIMIT 10";