Merge pull request #933 from SciML/ap/wording

docs: update performance wording

docs/src/index.md

@@ -62,9 +62,9 @@ the precision of the arguments are correct, and anything that requires alternati
 `ForwardDiffSensitivity` dual numbers) are suspect.
 
 Lux.jl has none of these issues, is simpler to work with due to the parameters in its function calls being explicit rather than implicit global
-references, and achieves higher performance. It is built on the same foundations as Flux.jl, such as Zygote and NNLib, and thus it supports the
-same layers underneath and calls the same kernels. The better performance comes from not having the overhead of `restructure` required.
-Thus we highly recommend people use Lux instead and only use the Flux fallbacks for legacy code.
+references, and achieves higher performance. It is built on similar foundations as Flux.jl, such as Zygote and NNLib. The better performance
+comes from not having the overhead of `restructure` required and fusing common operations in LuxLib.jl. Thus we highly recommend people use
+Lux instead and only use the Flux fallbacks for legacy code.
 
 ## Citation