Barca's sporting director Deco agrees with Rashford's assessment, and has hinted that the club do want to him to stay beyond this season.
He said: "It's too early to talk about decisions for next season, but what matters is that we're happy with him. What we thought he could bring to us, he's bringing.
"He's a very high-level player. He exploded very early, then he had great seasons at United, then he had years of more complicated management with changes of coaches, and perhaps he struggled too because they demanded a lot of things from him there. But we're happy with him - that's the most important thing.
"These aren't decisions for now. Now it's time to focus on the games to come. A decision will be made, but that's not being discussed right now. There's a contract between the clubs but it has to be discussed."
Hansi Flick has been equally impressed, hailing him as "outstanding" after his brace against Newcastle in the Champions League, adding: "I am not surprised [by his goals]. I think he's a fantastic player. His skills are unbelievable and his finishing is unbelievable.
"I think also in the first half, he tried to create chances, but the finishing wasn't there. In the second half it was.
"For a striker, it's always good to score. I am really happy. He is an important player. When we spoke before the season about what we needed in the team, we felt we needed a player like him.
"When we had this chance [to sign him], I said we have to do it. He's an outstanding player."