Columns of pg_stat_activity

Since we are wacking around pg_stat_activity for 9.2, what do people
think about these column names?
 backend_start    | timestamp with time zone | xact_start       | timestamp with time zone | query_start      |
timestampwith time zone |
 

Arguably:
backend_start -> session_startquery_start -> statment_start

Should we make any of these changes?

--  Bruce Momjian  <bruce@momjian.us>        http://momjian.us EnterpriseDB
http://enterprisedb.com
 + It's impossible for everything to be true. +