old_expat - 11:42 am on Mar 11, 2013 (gmt 0)
GWT is reporting that 1 (and only 1) of the sites, which happens to be a .co.uk can't access robots.txt.
A report on intodns says: "WARNING: Looks like the parent servers do not have information for your TLD when asked. This is ok but can be confusing."
I get thst same error on the other .co.uk site is spidering just fine.
Traffic is generally off about 25% on the larger sites. This is going on 2 months.
No other DNS errors or obvious connectivity problems on any but the 1 site referenced above.
As for CPR & CPC, I don't have very much data because of the short time on the new server, but:
1st 10 days in Jan (old server) 1.52 ctr .42 cpc
1st 10 days in Mar (new server) 1.72 ctr .35 cpc