I ran a production app on RavenHQ standard silver for the past year with the web app on AppHarbor. I noticed what I would call occasionally sluggish behavior, but I couldn't be sure if it was AH or RHQ. In either event, it wasn't bad enough for me to worry about. I tend to bend my designs so that I Load far more than I Query, but I never noticed any "several minute" lags.
For 200 docs, I wouldn't expect any significant delay. As a general piece of advice, I would create static indexes rather than relying on auto indexes. Auto indexes will "go away" if they are not used.
Are your docs huge or are your indexes very complicated? I would open a support ticket with RHQ on this matter for them to investigate. Their response times were very good in my experience. Also, RHQ support and the RavenDB forums are not the same, but, obviously, you can often find some help for RHQ here.