I have the Colorado 400T, and I know this issue has been addressed somehow all over this forum, but I have not read anything about my problem. Take a look at this picture The blue arrow is where I am actually driving, however, the Colorado "thinks" that I am still on the freeway! It take forever to update my new route.
I contacted Garmin about this problem, they told me to disable the TOPO map which I did, that improve my issue a little bit, but still happening. The same happens on the street specially the first time I deviated from a route. I have NT 2009 and the Beta 2.51 code loaded.
On top of that, I have all the problems addressed on this forum, here are the most annoying to me:
1) Barometer does not work when POWER is off.
2) Jumping around infrequently and unpredictably.
I have the Etrex Vista HCx as well, and this baby updates the route very quick!