Daeth 66 o gynrychiolaethau i’r Uwchgynhadledd, ynghyd â 1,500 o’r cyfryngau ledled y byd. Rhoddodd holl brif orsafoedd newyddion teledu yr Unol Daleithiau sylw i’r digwyddiad deuddydd yn eu rhaglenni newyddion yr hwyr, gan gynnwys sylw i’r cinio agoriadol yng Nghastell Caerdydd. Ac wrth gwrs, soniodd yr Arlywydd Obama ar gamera am harddwch eithriadol, pobl wych a lletygarwch arbennig Cymru, gan annog pawb o’r Unol Daleithiau i ddod ar ymweliad â Chymru. Nid oes modd cyfrifo gwerth cyfun cyhoeddusrwydd o’r fath.
66 delegations attended the Summit, along with 1,500 media from around the world.    All major TV news stations in the USA covered the two days in their evening news shows, including coverage of the opening banquet in Cardiff Castle.  And, of course, President Obama said on camera, “you can see the extraordinary beauty, the wonderful people and great hospitality, so I’d encourage everybody in the USA to come and visit Wales”.  The combined value of this publicity is literally incalculable.