Compared 3 cards: a WUSB54GS, a WPC55AG, and a WPC54GS (V2). The signal as read on a WRT54GSv5.1 (dd-wrt) and a WRT54GLv1.1 (Thibor) of the WPC54GS is about 20dB lower than the other two. Before anybody asks: Tests done on same laptop, 2 laptops right next to each other, laptops and cards twisted and turned, moved up/down, moved nearer/further, swapped cards from one to the other laptop, swapped PCMCIA slots, tried the Broadcom driver, the Linksys drivers, and even a Netgear driver for the WPC55AG. Signals gets better or worse by about 5 dB with all that, but the WPC54GS's Tx signal stays between 15 and 25 dB less than the other two. Although not exhaustively tested, it also seems the Rx signal of the WPC54GS is a bar or two lower than the other two. Has anybody else found such a dramatic signal difference?