LOL, Ken, yes, that would explain the 5 foot discrepancy . Seriously, though, this kind of vertical accuracy is not something one would normally expect of a consumer grade GPS receiver. John, my guess is that it was just a lucky coincidence the reading was so accurate.
On the other hand, the sensitivity to weak satellite signals should be noticeably improved in comparison to the older LT-20. If you've ever used an older GPS receiver, you will love the new LT-40. If LT-40 is your first receiver, you will not be able to fully appreciate how much better it is than receivers of few years ago .
I'm now at my PC with DeLorme Streets Atlas 2009. I quickly looked up some problem addresses. I picked a few addresses of either long established businesses or old apartment buildings - to make sure we are dealing with an address that very likely is in the database.
Here are some samples:
3300 Victoria Park Avenue, Toronto, Ontario, Canada
165 Cherokee Blvd, Toronto, Ontario, Canada
175 Hilda Avenue, Toronto, Ontario, Canada
4400 Dufferin Street, Toronto, Ontario, Canada
500 Murray Ross Parkway, Toronto, Ontario, Canada
I see the streets on the map, I'm just not sure how to go about successfully searching for the addresses In Street Atlas.