There are a few things to consider. FF MAY be additive'ized...
Machining metals (bits and pieces) can damage the oil pump by scoring the end plates...
To get to the filter, the oil has to go through the pump ...
The first thing you should do with any new engine (MFG or rebuilt) is to add a magnetic drain plug. That way you can actually see what comes out of it at first change. You can install one w/o losing much oil if you are prepared. Just hold you thumb over the hole when you pull the OEM plug, and insert your replacement. You might loose a few cups if you're quick.
While you're at it, install a new factory oil filter exactly like the one that came on it. Cut the old one apart. If you do not see shiny bits, you have a good clean motor, or all the bits are still in the sump... The magnet will get steel and iron. Aluminum and plastic bits are less of a problem ...
This is just reasonable prudence. You'all paid (or are paying) $40K or something. Why on earth take a chance with that big of an investment? It might make it through warranty and break 5,000 miles later due to something that happened early on... Then it's your wallet that takes the hit. All for the cost of a magnetic drain plug (~$12), a filter (~$10) and maybe two quarts of oil (~$10). So for less than a meal out with your wife, you can have peace of mind
If it all looks good as you go through this, sure do what Toyota says and run it down to 15%. Modern oils can go a long way. If anything looks off while you go through this, do what you planned - change early with knowledge of why ...