There's nothing better about MS on a business card if you do it correctly.
That's nearly always true, but if he is spending for a company, he may not get reimbursed until the statement cuts, in which case it will show very high utilization on the report.
That isn't much of a problem if he isn't opening any cards now, just make sure the statement before you apply is clear (or $2).
BUT, (I think you may have told me this is the credit thread) he could end up being rebucketed, which would take more then 1 statement to bounce back from. CMIIW.