The A20, A26 and B25 operated very successfully in the low-level attack role in the PTO. This seems to have fooled the USAAF into thinking the A26 with its high performance could be operated in the same way over Europe. As far as I know, the first combat sorties of the A26 in Europe ended with the loss of 12 of 12 aircraft sortied. Whatever its speed, an A26 at low level would have made a nicely big and comparatively un-agile target for those 20mm quads. The B25 and B26 operated in Europe at medium altitudes; most B25 in Europe had glass noses and anyway they were outnumbered by the B26, which wasn't really seen much in the PTO after 1942, but had a fairly low loss rate in the ETO.