'98 A6 slow upshift when cold

[Tom Tauskey]

When first starting out from a cold start, our '98 A6Q tiptronic w/ 69K miles is slow to upshift from 1st or 2nd gears.  After a couple of miles it obtains "normal" shift points. Car was purchased July '04 slow upshift pattern has been more noticeable recently.  Although audifans archieve search was not productive, info. on transmission websites lead to speculation that slow upshift pattern when cold may be emissions control related.  Toyota dealer from whom car was purchased had added a can of BG transmission additive.... don't know why.  No leaks, fluid level remains normal. Thoughts and comments appreciated. 

Tom Tauskey
Denver, CO
'98 A6Q
'89's 200Q, 80Q
'88 80