More extreme phenotypes when parents are from diverged populations
Yes, it would be reasonable to expect greater variation in the offspring of the Canadian woman.
Human genetic variation is the genetic differences among populations. Populations have access a pool of genes and over-time polymorphisms may arise to create greater variation.
Human populations within a species are defined by, divergence times and rates of gene flow - From mitochondrial, X and Y chromosome re-sequencing data.
Genetic Distance is the genetic divergence between species or between populations within a species (as in your example above). Populations with many similar alleles have small genetic distances. This indicates that they are closely related and have a recent common ancestor.
E.g. Height as you use for your example is a polygene. The inheritance of many genes alter phenotypic height of offspring.
Thus, it would be reasonable to expect a difference in allelic variations pertaining to height from the Canadian woman. The offspring may have a different height profile of alleles, and thus a different phenotypical height.
I should mention that:

&quot;individuals from different populations can be genetically more similar than individuals from the same population&quot;

But the above example - should not be expected.