Maybe the point from a user's perspective would be yours and from a developer's perspective would be his. Of course once the binary has been shipped to the user

Maybe the point from a user's perspective would be yours and from a developer's perspective would be his. Of course once the binary has been shipped to the user much can't be done there (except for things like hyperthreading as you say). However, a developer should not see 100% cpu as an indication that it can't be done faster and should realize that better algorithms and/or better memory access patterns can cause more work to be done even if both show 100% cpu. Of course I would argue that this should be obvious to all but novice programmers who worry about performance, but his article does paint the picture in a pretty clear way and will maybe help more realize what's really going on here.