Just got off the phone with an NFL general manager. He was not at the Alabama Pro Day, but relayed to me the report he had been given via phone from one of his scouts. I asked him to characterize the impression he received from the scout regarding Smith with one word. His word: "disappointing."
Smith measured in at 6-4 1/4, 325 pounds and was timed in the high 5.2s to low 5.3s in the 40-yard dash. He also posted only 19 repetitions of 225 pounds, a surprisingly low number considering the strength he shows on the gridiron. The bench press number won't concern scouts too much due to the fact that Smith has very long arms (35 5/8"), but the number is still surprisingly low.
The GM still expected to see Smith ultimately drafted between 10-20 and referred to Smith's film and interviews at the Combine as the reason why. Apparenty, despite sounding unprepared and silly, at times, when fielding questions for the media, Smith was more effective in his conversations with teams.