incoming smtp from v6 addresses

[Randy Bush <randy () psg com>]

for incoming mail that is *accepted*, i.e. not stuff like
    2012-01-04 00:37:28 REJECT because 118.39.80.118 listed in rbl-plus.mail-abuse.org
    2012-01-04 00:37:28 H=(nexo.es) [118.39.80.118] F=<pedrom () nexo es> rejected RCPT <owner-radiusext () ops ietf 
org>: blocked because 118.39.80.118 is in  blacklist at rbl-plus.mail-abuse.org: Mail from 118.39.80.118 blocked using 
Trend Micro Email Reputation database. Please see <http://www.mail-abuse.com/cgi-bin/lookup?118.39.80.118>
    2012-01-04 00:37:28 no host name found for IP address 118.39.80.118
    2012-01-04 00:37:29 REJECT 118.39.80.118 too many bad recip
    2012-01-04 00:37:29 REJECT because 118.39.80.118 listed in rbl-plus.mail-abuse.org

7.8% is over ipv6 transport

but only 2% of outgoing deliveries are over ipv6.

what do other folk see?

randy