Mutt speaks the truth, as always.
Of course it's true! Screen Height and Net Obstacle Clearance is reduced from 35 ft to 15 ft, that is 20 ft LESS obstacle clearance. In the INITIAL portion of the OEI climb, GROSS Vs NET is very small in terms of vertical obstacle clearance, it's not until later in the 2nd segment climb that the diverging GROSS and NET flight paths provide more 'fat'. (Your quotation refers to the initial climb, and so do I).
Wet runway data is a major concession to get you flying on a wet runway day, eliminating a LOT of safety margins, and yet there are still jerks who will use Wet runway data for Dry runway operations!!!
Regards,
Old Smokey