Added a pair of disc braked 700C wheels to the ICE B2 upgrading from the 26" that came with it. Shod with 25mm conti 4 seasons, so not slow tyres either, assumption being that as long a I can keep turning the pedals I should be going quicker for the same cadence.
At lunchtime rode the almost identical lap to wot I rode in August with the 26" on it.
August - 27.62km / 1hr 2min / average 26.6kmh / Ave HR 117, Max 136
Today - 26.54km / 59:51 / average 26.6 / ave HR 135 / max 153
Only real conclusion there is that I can't really make a conclusion. Although it was breezy in August, I think it was somewhat more so today, suggesting that the 700Cs will have expected advantage in stiller weather and that I might have been even slower on the 26" today.
Surprisingly no adverse control/getting feet to ground issues, may even try clipless next time.