Although more work is needed before drawing a quantitative view of ISOCAM sensitivity for all observing modes and configurations, preliminary results generally confirm expectations as defined by the ISOCAM simulator. However, one bug in the SW detector efficiency profile used in the photometric model had been encountered and overlooked in the derivation of the ISOCAM Observer's Manual Table 19, page 85. The correct profile leads to a higher sensitivity in the shortest wavelength broad band filters, which is higher by a factor up to 1.5.