I have a friend who is an associate at a big law firm who is 30 and did the very traditional route of vac scheme in second year then TC offer. Her boyfriend, who is also 30, just qualified this year. It is not a defining characteristic that he qualified a bit later, and now they're pretty much in a similar situation in life and I promise you, no-one is discussing this when they talk about him. People speak about him as an expert in his field because he used those 'extra' years to work hard.
Everyone has such different paths in life and I honestly think that what is meant for you will come to you if you work hard at it and stay true to yourself. I am also 25 and whilst it could seem to some that I could have qualified by now, I know that I have so much life experience and this journey proved to me how much I was willing to work hard over the past year. I burst out crying when I got the TC call and it was because I knew how much this meant to me because of the journey.
Honestly, life is a long journey and nothing should be a rush because things worthwhile are things worth waiting for!! You have nothing to prove to anyone except yourself, so just be as great as you know you are.