Are any of the big registrars trustworthy? I'm trying to consolidate all of my domains on Namecheap right now. I transferred one domain from Dyndns and they di

Are any of the big registrars trustworthy? I'm trying to consolidate all of my domains on Namecheap right now. I transferred one domain from Dyndns and they did the transfer within a few hours (nice!). Then I went to transfer another from Network Solutions and four days later I am still waiting. Do they think I'll change my mind if they refuse to release the domain for a week?