Yes, IQAS is apparently slowing down. After acknowledgment email there was only 10 business days time, then it increased to 15, 20 and now 25. They also have changed the acknowledgement email to several days. CRS score drop is might be the main reason because lot of people are now going for IQAS because of hassle free process. I would advise to have patience and wait for your acknowledgement. One of my friend from Pakistan received acknowledgement after 14 days and other received his ECA after 1.5 month. After WES, even though the processing time is being increased, it's still the fastest and professional ECA organization.