Nope. In fact, this is the excerpt from the access log of Google bot's visit this month:
Code:
66.249.66.43 - - [01/Nov/2006:12:20:38 +0000] "GET /robots.txt HTTP/1.1" 404 300 "-" "Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)"
66.249.66.43 - - [01/Nov/2006:12:20:38 +0000] "HEAD / HTTP/1.1" 200 0 "-" "Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)"
66.249.66.43 - - [01/Nov/2006:12:20:39 +0000] "HEAD / HTTP/1.1" 200 0 "-" "Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)"
66.249.66.166 - - [03/Nov/2006:21:50:26 +0000] "GET /robots.txt HTTP/1.1" 404 300 "-" "Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)"
66.249.66.166 - - [03/Nov/2006:21:50:26 +0000] "GET / HTTP/1.1" 200 10902 "-" "Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)"
66.249.66.166 - - [04/Nov/2006:04:41:55 +0000] "GET /robots.txt HTTP/1.1" 404 300 "-" "Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)"
66.249.66.166 - - [04/Nov/2006:04:41:55 +0000] "GET /sitemap.shtml HTTP/1.1" 200 8371 "-" "Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)"
66.249.66.166 - - [06/Nov/2006:20:20:03 +0000] "GET /robots.txt HTTP/1.1" 404 300 "-" "Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)"
66.249.66.166 - - [06/Nov/2006:20:20:03 +0000] "GET / HTTP/1.1" 200 10946 "-" "Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)"
66.249.66.166 - - [07/Nov/2006:21:42:38 +0000] "GET /robots.txt HTTP/1.1" 404 300 "-" "Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)"
66.249.66.166 - - [07/Nov/2006:21:42:38 +0000] "GET /script/pep.js HTTP/1.1" 200 640 "-" "Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)"
66.249.66.166 - - [07/Nov/2006:23:42:15 +0000] "GET /script/pep.js HTTP/1.1" 200 640 "-" "Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)"
66.249.66.166 - - [08/Nov/2006:16:26:27 +0000] "GET /robots.txt HTTP/1.1" 404 300 "-" "Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)"
66.249.66.166 - - [08/Nov/2006:16:26:27 +0000] "GET / HTTP/1.1" 200 11019 "-" "Mozilla/5.0 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)"
Note the 404 on the robots.txt - definitely not there.