No, it isn't. As long as the unit is purchased during the period while the following remains posted on TomTom's site, any ambiguities or conflicting information is construed against the maker (TomTom).
If it applied to me, I wouldn't hesitate for a second to use this point in a phone call to get the map upgrade within 30 days of first connection/registration through TTHome.
How do I claim my latest map guarantee?
Automatically at TomTom HOME...
The first time you connect your device to TomTom HOME, HOME will automatically check if a newer version of your map is available to download straight away.
...and as often as you like in 30 days!
If a new map isn’t available, you can check HOME as often as you like within the next 30 days.
But again, if Home fails to see that a newer map is available (due to the bug) you are required to call tech support. When you call tech support, you only have 30 days from date of purchase. It all depends if you are lucky.
For example, I could purchase a TomTom Jan 1st, NEVER connect/register the device to/via Home, then on October 1st I find out from a friend that I can connect my TomTom to my PC to get free updates. Since it will be my first time my TomTom has ever interacted with a PC, Home will assume I just purchased my TomTom, will require me to register the device, and WILL allow me to download my free latest map within 30 days. BUT, if you happen to get the Home LMG bug (which most people get) Home will say that you already have the latest map (but you really don't) and you will be forced to call tech support. Tech support will see your receipt which is dated 9 months ago, and will refuse you a map upgrade, even though I have never connected my TomTom to Home.
So there are 2 answers to this question.
You will have 30 days from the time you
first connect/register the device to download the latest map,
IF you don't get the Home LMG bug.
or
You will have 30 days from the
date of purchase
to download the latest map
IF if you happen to get the LMG bug and are required to call tech support.
This is the WHOLE reason TomTom has you fax/email a copy of a receipt.
canderson, I do see what you're saying though, but why else would they even require a sales receipt? If the only requirement were from the time you connected/registered your device, they wouldn't need a receipt at all, instead all they would have to look at is your registration date. Yea they also look at the receipt to make sure the vendor is authorized to sell, but they mainly ask for a receipt to verify the "date of purchase"
There are many exceptions that happen though. Many members here have been denied LMG's because they didn't take care of business within the 1st 30 days, and also haven't even registered the device yet. As canderson says, this may be wrong doing of TomTom to deny customers LMG based on "date of purchase", since the site does clearly state that it's from the time you connect/register your device.