There are certainly more than 20 girls in each of the 6th form years at Tormead - check out the Leavers' Destinations section of the school's website and count for yourself! - www.tormeadschool.org.uk/sixth-form/university-destinations/ and here for the most recent ISI educational quality inspection report (which was glowing ) www.tormeadschool.org.uk/wp-content/uploads/2017/06/Tormead-School-EQI-Final-16-06-17-1.pdf .
I agree with Tormead Mum that you should go with your gut instinct when choosing the school for your daughters and, as she has stated, just because you choose one school for them now, doesn't mean that you cannot choose another for secondary level or A Levels later down the line, should you feel that the "fit" is not right.
My girls have stayed for Tormead Senior School; we are very happy with it and they are thriving, challenged by the work and are actively involved in both sports teams and music and drama productions.
We chose the Tormead way over other local schools - any girl is welcome to try her hand at any activity, no matter how lacking in initial ability or talent she may be (!). This encourages perseverance, which I think, is a valuable life skill. I think that some local private schools concentrate on excellence in everything to such an extent that, instead of fostering a "give it a go and see what happens" attitude in their pupils, encourages specialisation in particular areas far too early and makes some girls incredibly risk-averse at trying anything that they do not feel they can comfortably "ace".
This is hardly a helpful philosophy to take forward into life beyond school and can produce overly-anxious young adults, who lack the resilience to persist at things they find initially difficult (I am repeating what I have posted on another thread, so apologies if you have previously read this but I think it is an important difference between the Guildford girls' schools.)
I agree that there were some initial parental concerns about Tormead's headlong rush to use ipads. There has been some rowing-back on this by the school in the last 18-24 months and we feel that the correct balance for their use has now been struck. Feel free to PM, Canadian, if you have any specific questions.