Load Balance Test Script

New ISP installed and added to a load balance group. However the ISP has terrible letancy issues (satellite) and I would like that connection to be dropped from the group when the latency becomes too great. Wrote the following script

#!/bin/bash
/bin/ping yahoo.com -c 3 2>/dev/null 1>/tmp/testout.log
sed -i '1d' /tmp/testout.log
sed -i '4,7d' /tmp/testout.log
sed -i 's|^.*time=||' /tmp/testout.log
sed -i 's|\ ms||' /tmp/testout.log
sed -i 's|\..*||' /tmp/testout.log
linetotal=0
while read line
do
linetotal=$(($linetotal + 1))
done < /tmp/testout.log
SUM=0
while read line
do
SUM=$(($SUM + $line))
done < /tmp/testout.log
final=$(($SUM / $linetotal))
if (("$final" > "900")); then
exit 1
else
exit 0
fi

and modified the load balance settings

 interface eth0.3 {
     route-test {
         type {
             script /config/scripts/lbtest.sh
         }
     }
     weight 50
 }

and the watchdog status shows

  eth0.3
  status: Running 
  pings: 205
  fails: 0
  run fails: 0/3
  route drops: 0
  test script : /config/scripts/lbtest.sh - OK

I am assuming that the watchdog is looking for exit codes with the above givng code 1 for average response times greater than 900ms, making the test a failure and marking the connection as inactive. Is my assumption correct?