Does it matter what country my relative is from, for immigration purposes?
Yes. Each country is only allowed a certain number of visas per year.
There are often more visa petitions filed for citizens of China, India, Mexico, and the Philippines than there are for the number of visas available for people from those countries. People from those countries often have to wait longer for a visa.
Current wait times can range anywhere from two to 24 years depending on your relative’s country of origin; your status in the U.S.; and the type of family relationship the immigration is based on. The wait is determined by your priority date and the visa bulletin.