Yes. Limitations in the number of global populations used and the number of samples tested in the International HapMap recombination rate studies limit what we know.

SNP values at 12 locations in sequence
Mother G A T A G A T A G A T A
G A T A G A T A G A T A
Father G A T A G A T A G A T A
G A T A G A T A G A T A
Child G A T A G A T A G A T A
G A T A G A T A G A T A

For example, if a single nucleotide polymorphism (SNP) with values of A or G usually has an A value in European populations, scientists are unlikely to detect recombination events at that SNP in samples from Europe. When several SNPs like this occur in sequence, recombination is under reported. Therefore, centiMorgan values are artificially low.