The quick answer is probably not. There are a few reasons why he hasn't got back to you:
1. He is a busy guy who gets a lot of emails and he has to prioritise.
2. He has been around for a (very, very) long time and email spamming firms must all have multiple copies of all of his email addresses by now. With this in mind he has a lot of filters in place to catch spam and your mail may have been caught by one of these filters. Try resending it with a different title.