Delve praised the execution of the team's second try, which developed after a powerful carry by loose forward Aaron Wainwright.
"Good patience from Wales and Dan Edwards walks it over," he said.
Former Wales captain and coach Rachel Taylor also analyzed the gameplay and environmental challenges on BBC Radio Wales.
"That shows how ruthless Wales can be when they have that speed of ball.
There's been situations in the middle of the pitch where they need to speed it up," Taylor said.
Taylor highlighted the necessity of managing player welfare due to the high temperatures in London.
"Water breaks are key in this heat, to play in these conditions is tough. With the physicality and speed of the game it is needed," she said.
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The sporting event also features legendary Wales and British and Irish Lions winger George North, who is appearing for the Barbarians in the final professional match of his career.
