The following code will exit (with an appropriate error code) on the first line it encounters that has a time in brackets that isn't 60. The error code will be the time it found.

my @test_data = ( 
    qw/bananas apples oranges/,
    'Thu Oct 18 21:26:36 2007: Time for all triggers in report period 
+(60s): 1.330981s',
    'Thu Oct 18 21:27:36 2007: Time for all triggers in report period 
+(120s): 1.457271s',
    'Thu Oct 18 21:28:36 2007: Time for all triggers in report period 
+(300s): 1.340150s'
);

for ( @test_data ) {
    if ( m/\((\d+)s\)/ && $1 != 60 ) {
        print "$_\n";
        exit $1
    }
}
[download]