Steingold pretty much seems to be saying "OCaml sucks because it isn't Lisp". I think languages like OCaml and Haskell would work nicely in situations where you have a pretty good idea of how your program is going to work before you write any code. I've never worked on a non-trivial project where that was the case.
Ultimately, I think both OCaml and Haskell have a much nicer feel than Blub, but when I need to get something done, I reach for Common Lisp before anything else.
I started working on an opengl game in haskell. I've got less than 1000 lines of code, but a lot of functionality.
I've found the code is easy to change. Type inference lets me swap out datatypes without changing any code. If i need to add or remove arguments, the compiler tells me everything i need to update.
I've run into two situations where i don't know what to do next. Both times, I've been able to figure out what i need, without figuring out exactly how to do it. That gave me enough of an edge to write a quickcheck test or two. Then i fooled around with various implementations until i found something that met quickcheck's requirements.
It's been very nice.
That said, i've picked up haskell 4 or 5 times, worked on something for 1-3 months, become frustrated, and quit. I feel like i'm finally proficient enough to actually solve problems.
I don't know if it's worth it. I've come to appreciate all the compiler can tell me. In CL, you can use very abstract data structure access like elt. + is overloaded to work on everything. Haskell gives typeclasses. Haskell macros are disgusting, where lisp macros are very pretty. Since haskell is lazy, a lot of the control flow macros aren't as useful.
I like haskell. I'd like it to be my default language. Lisp lets me make lisp look like they way i think, so i can write big fancy programs. Haskell frees me up from thinking about the rest of the program so i can write nice modules.
Ultimately, I think both OCaml and Haskell have a much nicer feel than Blub, but when I need to get something done, I reach for Common Lisp before anything else.