I can mirror the comments of "lake vs pool" I experience a very nervous sensation in the lake that I do not in the pool. I have been able to adjust a little by really getting a good warm up and by slowing down...
The mind can be such a terrible thing! (ha)
Good luck to everyone and if you ever figure out a way to replicate pool performance in the lake..let me know!
Oh and for the record... I swam in a continous pool at first, and had a little trouble transitioning into the pool... (i switched over becasue chapter 13 of total immersion basically said "do not swim in a continuous to learn")