AVG has significantly improved signatures and other detection methods. By far (at least in my opinion), AVG has the lowest false positives. That alone was enough to impress me. Not a single file on my computer that normally is detected as FP was detected by AVG (unlike ALL other AV).
As for the slow removal, yes it's slow but with advanced removal that is ok. AVG and any other vendors did NOT intend for you to run or scan a folder full of malware. They must protect the user, not cater to AV testers. Myself being a AV tester as well, I do not mind as long as it does the job, and AVG does do the job. It is also one of few that really gets it hands dirty in killing off adware.