Blackshift's correct, don't worry about it. The only people who put any emphasis on hours to solo are the military. They use it as a guide to student capacity, rate of learning and 'natural ability'. The crucial thing is that this is assessed in a controlled environment, full time course with very tightly standardised instructors. MoD Flying Scholarship cadets were required to go solo within 13 hours maximum or they were chopped. Remember these were mostly teenagers who had been through aptitude selection and were subject to the above course environment.
If you are on a ppl course then relax and let it happen. Same for commercial, as long as you are not getting into the 20-25 hours plus and not been solo regime, in which case the flying school may well be wasting your money...
The ability to fly a stable approach, flare and landing is the most common stumbling block prior to first solo. I've trained many students who sailed through their training until they reached the circuit and then took hours to hack the approach and landing. If you are stuck at this point and find yourself frustrated, sometimes flying with a different instructor helps. Your existing instructor may be perfectly able, it's just that a different viewpoint or teaching technique can make all the difference.
Instructors aren't looking for perfect landings when making the first solo judgement call. We're looking more for a stable approach and a decently, consistently judged flare, but most importantly that the student can realise when it's going pear-shaped and make a positive decision to bin the landing and execute a safe go-around. This is the key, and a lot of students become fixated on carrying out some sort of landing regardless, even if they should have thrown it away and gone around already.
ST