It has been suggested that a GEDCOM file be made available to others, I have on such file. It was generated by Family Tree Maker Version 11 and the file was a demo file that came with the program.
There are 626 People in this file, 252 Marriages, and 43 Master Sources. Other statistics are not reported as each program counts records differently. The key focus for this test, is People, Marriages, and Sources.
Opening this GEDCOM file in Roots Magic 4, there were 262 People. The other statistics in Roots Magic do not appear to compare to those provided by Family Tree Maker.
There did not appear to be any issues importing this file into Roots Magic 4.