Windows Grep

Here is a short test of the short list ;-)
I run some tests in a directory with 6350 sub-directories and total of 41531 files. The files spectrum is: text files, archives (.ZIP, etc), MS Office documents:
1. A text (NOT regex) case insensitive search of all files;
2. The previous test but checked options to skip binary files and special directories with the tools where these options are available;
3. Test 1 but as regex (the search string contains no regex "wildcards").
Here are the results (the information is delivered as is reported by the corresponding tool):
Windows Grep 2.3.0.2403:
1. 1666 matches in 409 files. 41453 files searched, 0 files skipped. 1283068.30 Kb searched in 5m 38s (3796.06 K/s);
2. 1212 matches in 301 files. 31837 files searched, 9616 files skipped. 739334.35 Kb searched in 2m 29s (4961.98 K/s). Checked options "Skip binary files" and "Skip _vti*";
3. 1666 matches in 409 files. 41453 files searched, 0 files skipped. 1283068.30 Kb searched in 6m 22s (3358.82 K/s);
Notes:
- The CPU load during the searches is about 50%;
- Throw error (dialog window) "Out of resources" during test 2;
- Results view is only available after the search is finished;
- Shows the results in context and highlights the match.

AstroGrep 4.1.4:
1. 1342 matches (counted by hand) in 405 files (counted by hand) for 2m 44s (measured by hand) and reported errors in 192 files (consider them "skipped");
2. N/A - the tool has no appropriate options;
3. 1342 matches (counted by hand) in 405 files (counted by hand) for 7m 40s (measured by hand) and reported errors in 192 files (consider them "skipped");
Notes:
- The CPU load during the searches is about 50%;
- Results view is available during the search run;
- Has option to save the results to a file;
- Shows the results in context and highlights the match.

grepWin 1.3.3.224:
1. Searched 41295 files, skipped 1 files. Found 1621 matches in 405 files. (The search took 3m 06s - measured by hand);
2. Searched 41295 files, skipped 1 files. Found 1170 matches in 299 files. (The search took 3m 07s - measured by hand). Unchecked option "Include binary files";
3. Searched 41295 files, skipped 1 files. Found 1621 matches in 405 files. (The search took 3m 07s - measured by hand);
Notes:
- The CPU load during the searches is about 50%;
- Selected option "All files" as the default is "[File] Size is less than 2000 KB"

dnGREP:
1. 405 files found in 117387.6198ms (1m 57s);
2. N/A - the tool has no appropriate options;
3. 10 files found in 120293.7954ms (2m 0s).
Notes:
- The CPU load during the searches is about 100%;
- Doesn't report the number of matches in each file;
- Doesn't report the file's directory;
- Displays only the matching without searched string highlight;
- Offers the unique option of regex match on multiple lines
- The "Case sensitive" option is disabled when the "Regular Expression" option is selected - it seems that the regex should include the corresponding option but, unfortunately, I couldn't manage to do it as the documentation is grabbed from a different source and is not adapted to the tool.