It's all about getting the right balance for the right kind of office. Conditions required in a major lawyers' UK headquarters building are very different from those you need in a telesales call centre. Background noise, aircon noise, privacy, sound insulation between cellular offices and meeting rooms, and reverberant conditions in open plan areas all need to be carefully thought out for the office users.
In a speculative office development, flexibility and diversity need to be second guessed at the design stage.
Examples: Diagio, PwC Bucharest, BrindleyPlace, Cabinet Office, JP Morgan Chase.