I have tried it! In the 1970s I spent 2 years on the staff of the Victoria & Albert Museum, London. Among my tasks was publicity shots of exhibitions, for which I normally used a 4x5" MPP with a 90 mm 6.8 Angulon and HP4 film - when pressed for time, however, I used a tripod-mounted Leica IIIf with a 28 mm 5.6 Summaron or 35 mm 2.8 Summaron and loaded with Pan F which I developed in stock ID-11. Neither my fellow photographers or the PR department could tell the difference when shots on the 2 formats were mixed together. To achieve this, it is essential to use a solvent-type fine grain developer and NOT Rodinal or any specialist sharpness-enhancing brew. More recently I have tried Delta 3200 - it's not bad for a true ISO 1000 film but in my tests, developing in ID-11 and DDX, there was always visible grain in an 8x10" print from a 6x7 or 6x9 neg.
Regards,
David