Does size of a VARCHAR column matter when used in queries

Possible Duplicate:
is there an advantage to varchar(500) over varchar(8000)?

I understand that a VARCHAR(200) column containing 10 characters takes same amount of space as a VARCHAR(20) column containing same data.

I want to know if changing a dozen VARCHAR(200) columns of a specific table to VARCHAR(20) would make the queries run faster, especially when:

• These columns will never contain more than 20 characters
• These columns are often used in ORDER BY clause
• These columns are often used in WHERE clause
  • Some of these columns are indexed so that they can be used in WHERE clause

PS: I am using SQL Server 2000 but will upgrade to later versions of SQL anytime soon.