Yes more so than Smalltalk. While both have unary and keyword messages, the messages in the Cocoa APIs are generally much more verbose than their Smalltalk analogues. Compare insertObject:atIndex: from NSMutableArray with at:put: from Smalltalk's Array, OrderedCollection, and Dictionary.
Also, Smalltalk has binary messages (with which arithmetic is implemented), which allows for the creation of useful shortcuts like "," for collection concatenation and "@" for point creation. Smalltalk has precedence levels associated with its message syntax; Objective-C doesn't, hence [the [bracket soup]]. Smalltalk also has an extremely concise block closure syntax and no need for header and object files or special function/class declaration syntax.
Also, Smalltalk has binary messages (with which arithmetic is implemented), which allows for the creation of useful shortcuts like "," for collection concatenation and "@" for point creation. Smalltalk has precedence levels associated with its message syntax; Objective-C doesn't, hence [the [bracket soup]]. Smalltalk also has an extremely concise block closure syntax and no need for header and object files or special function/class declaration syntax.