Horsejumper, welcome to Psych Central! Sorry you are not having the same results with the generic. Consulting your psych doc may mean he will adjust the dosage or make a change.

For other opinions and experiences I found some other blogs and posts on Psych Central since I have on experience with this med.
Psych Central - Search results for Comparison of Lexapro versus Escitalopram

Hope you feel better soon.