The 757 rotation technique as taught at AA is to smoothly begin rotation AT VR trying for 2.5 degrees per second to 10 degrees. The aircraft should be airborne during those 4 seconds and rotation is smoothly continued to maintain V2 +15 which requires 18-20 pitch attitude.
At VLO and 10 degrees pitch, the 757-200 tail (All AA 757's are -200s) is about 33 inches above the tarmac with the struts extended. Tail contact takes about 12.5 degrees with struts extended. With struts fully compressed, which they would NOT be for any TO the tail will contact at 10 degrees.