 No one knows how long the magnanimity will last, but the cadre of analysts who cover XPO Logistics Inc. appears willing to give the transport giant the benefit of the doubt. Concerned about narrowing margins at XPOs NYSE: XPO all-important North American LTL segment following a subpar third-quarter print, analysts spent most of Wednesday morning parsing the companys fourth-quarter results and peppering executives to glean any clue on the segments direction. 