JmeterSummarizer report type doesn't take Min:/Max: time values from summary log entries into account. It only uses Average for these though parser seems to work fine.

From log entry like that:

2014/01/16 08:04:37 INFO - jmeter.reporters.Summariser: summary + 20 in 10.003s = 1.9/s Avg: 1003 Min: 1002 Max: 1006 Err: 0 (0.00%)

I get this report entry:
90% line: 1003
Percentage of errors: 0
average: 1003
errors: 0
max: 1003
median: 1003
min: 1003