Do you use the proper gigabit power injectors? Using regular injectors will limit you to 100 mbps since they don't offer all 4 cable pairs for data transport. Of course, the autonegociation is also needed, as stated by roc-noc.
At least the 260GSP should power it up correctly at 1Gbps, if cabling is correct. Also the competiton's edgeswitch works properly (verified).
Torturing CCR1009-7G-1C-1S+, RB450G, RB750GL, RB951G-2HnD, RB960PGS, RB260GSP, OmniTIK 5HnD and NetMetal 922UAGS-5HPacD + R11e-5HnD in my home network.