I don't think anyone thinks you are lying, however the amount of resistance you are using is probably not very realistic compared to actually riding.
O your 100% right on that because i have only been able to sprint up to 38 on a flat.
What trainer are you using? How tight are you tightening it against the tire? Most require contact with the tire plus 2 - 2 1/2 turns
CycleOps Mag+ i set it till it looked like my tire was under load